Which oxides react with potassium oxide. T e m e IV

Potassium - the nineteenth element of the periodic table of Mendeleev, belongs to the alkali metals. It is a simple substance that, under normal conditions, remains in a solid state. state of aggregation. Potassium boils at a temperature of 761 °C. The melting point of the element is 63 °C. Potassium has a silvery-white color with a metallic sheen.

Chemical properties of potassium

Potassium - having a high chemical activity, therefore it cannot be stored in the open air: the alkali metal instantly reacts with the surrounding substances. This chemical element belongs to group I and period IV of the periodic table. Potassium has all the characteristic properties of metals.

He interacts with simple substances, which include halogens (bromine, chlorine, fluorine, iodine) and phosphorus, nitrogen and oxygen. The interaction of potassium with oxygen is called oxidation. During this chemical reaction, oxygen and potassium are consumed in a 4:1 molar ratio, resulting in the formation of potassium oxide in the amount of two parts. This interaction can be expressed by the reaction equation:

4K + O₂ \u003d 2K₂O

During the combustion of potassium, a flame of bright purple color is observed.

Such an interaction is considered a qualitative reaction to the determination of potassium. The reactions of potassium with halogens are named according to the names of the chemical elements: these are fluorination, iodination, bromination, chlorination. Such interactions are addition reactions. An example is the reaction between potassium and chlorine, which produces potassium chloride. To carry out such an interaction, two moles of potassium and one mole are taken. As a result, two moles of potassium are formed:

2K + СІ₂ = 2КІ

Molecular structure of potassium chloride

When burning in the open air, potassium and nitrogen are consumed in a molar ratio of 6:1. As a result of this interaction, potassium nitride is formed in the amount of two parts:

6K + N₂ = 2K₃N

The compound is green-black crystals. Potassium reacts with phosphorus in the same way. If you take 3 moles of potassium and 1 mole of phosphorus, you get 1 mole of phosphide:

3K + P = K₃P

Potassium reacts with hydrogen to form a hydride:

2K + N₂ = 2KN

All addition reactions occur at high temperatures

The interaction of potassium with complex substances

Complex substances with which potassium reacts include water, salts, acids, and oxides. Since potassium is active metal, it displaces hydrogen atoms from their compounds. An example is the reaction between potassium and hydrochloric acid. For its implementation, 2 moles of potassium and acid are taken. As a result of the reaction, 2 moles of potassium chloride and 1 mole of hydrogen are formed:

2K + 2HCI = 2KSI + H₂

In more detail, it is worth considering the process of interaction of potassium with water. Potassium reacts violently with water. It moves on the surface of the water, it is pushed by the released hydrogen:

2K + 2H₂O = 2KOH + H₂

During the reaction, a lot of heat is released per unit time, which leads to the ignition of potassium and the released hydrogen. This is a very interesting process: upon contact with water, potassium instantly ignites, the violet flame crackles and quickly moves along the surface of the water. At the end of the reaction, a flash occurs with splashing of drops of burning potassium and reaction products.

Reaction of potassium with water

Basic final product reactions of potassium with water - potassium hydroxide (alkali). The equation for the reaction of potassium with water:

4K + 2H₂O + O₂ = 4KOH

Attention! Do not try to repeat this experience yourself!

If the experiment is carried out incorrectly, you can get a burn with alkali. For the reaction, a crystallizer with water is usually used, in which a piece of potassium is placed. As soon as the hydrogen stops burning, many want to look into the crystallizer. At this moment, the final stage of the reaction of potassium with water occurs, accompanied by a weak explosion and splashing of the resulting hot alkali. Therefore, for safety reasons, it is worth keeping some distance from the laboratory table until the reaction is complete. you will find the most spectacular experiences you can have with your kids at home.

The structure of potassium

The potassium atom consists of a nucleus containing protons and neutrons, and electrons revolving around it. The number of electrons is always equal to the number of protons inside the nucleus. When an electron is detached or attached to an atom, it ceases to be neutral and turns into an ion. Ions are divided into cations and anions. Cations have a positive charge, anions have a negative charge. When an electron is attached to an atom, it becomes an anion; if one of the electrons leaves its orbit, the neutral atom turns into a cation.

The serial number of potassium in periodic table Mendeleev - 19. This means that there are also 19 protons in the nucleus of a chemical element. Conclusion: there are 19 electrons around the nucleus. The number of protons in the structure is determined as follows: from atomic mass take away serial number chemical element. Conclusion: there are 20 protons in the potassium nucleus. Potassium belongs to the IV period, has 4 "orbits", on which electrons are evenly distributed, which are in constant motion. On the first "orbit" there are 2 electrons, on the second - 8; on the third and on the last, fourth "orbit", 1 electron rotates. This explains high level the chemical activity of potassium: its last "orbit" is not completely filled, so the element tends to combine with other atoms. As a result, the electrons of the last orbits of the two elements will become common.

Potassium oxide is a crystalline solid that forms colorless crystals. It has two stable crystalline modifications: cubic (up to 372°C) and hexagonal (above 372°C).

• Melting point - 740°C.
• Density - 2.32 g / cm 3.

Potassium oxide melts in air and, absorbing CO 2, gives K 2 CO 3. It violently interacts with water to form KOH. Reacts with ether and alcohol.

At a temperature of 250°C, it reacts with H 2 . In this case, KOH is formed. At the same temperature, it interacts with NH 3 to form KOH and KNH 2 .

3D model of a molecule

Vigorously enters into reactions with halogens, molten, various acids. When heated with oxides of boron, aluminum, silicon, it forms borates, aluminates and polysilicates, respectively.

When heated with NO 2, a mixture of KNO 3 and KNO 2 is formed.

Potassium oxide is obtained:

The content of potassium oxide in soil and fertilizers

The availability of potassium for plants depends on the form of availability of potassium in the soil. PPA cations and water-soluble potassium compounds are the main sources of potassium nutrition for plants. In this regard, the degree of provision of the soil with potassium for the needs of plant nutrition is expressed by the content in the mobile form and through potassium oxide K 2 O. This value indicates the total amount of exchangeable and water-soluble calcium in mg/kg of soil.

Potash fertilizers are highly soluble in water. When introduced into the soil, they quickly dissolve and, on the basis of exchange reactions, interact with the PPC. Part of the fertilizer potassium goes into non-exchangeable fixed soil compounds.

1. A substance whose composition corresponds to the formula P 2 O 5 refers to:

a) acids b) acid oxides;

c) grounds; d) basic oxides.

2. A precipitate is formed when a NaOH solution reacts with a substance whose formula is:

a) CO 2 ; b) FeSO 4 ; c) H 3 PO 4 ; d) BaCl 2 .

3. Potassium hydroxide not reacts with a substance whose formula is:

a) P 2 O 5; b) H 2 SO 4; c) Ba(OH) 2 ; d) AlCl 3 .

4. General scheme of transformations

E -> EO 2 -> H 2 EO 3

a) phosphorus -> phosphorus(V) oxide -> phosphoric acid;

b) aluminum -> aluminum oxide -> aluminum hydroxide;

c) calcium -> calcium oxide -> calcium hydroxide;

d) carbon -> carbon monoxide (VI) -> carbonic acid.

Option 2

1. A substance whose composition corresponds to the formula Ba(OH) 2 refers to:

a) alkalis; b) basic oxides;

c) salts; d) insoluble bases.

2. A precipitate is formed by the interaction of a solution of H 2 SO 4 with a substance whose formula is:

a) HNO 3 ; b) Fe(NO 3) 2; c) Na 3 PO 4; d) BaCl 2 .

3. Sodium hydroxide interacts with a substance whose formula is:

a) SO 2 ; b) Mg(OH) 2 ; c) CaO; d) K 2 SO 4.

4. General scheme of transformations

E -> EO -> E(OH) 2

corresponds to the genetic series:

a) sodium -> sodium oxide -> sodium hydroxide;

b) aluminum -> aluminum oxide -> aluminum hydroxide;

c) barium -> barium oxide -> barium hydroxide;

d) phosphorus -> phosphorus(V) oxide -> phosphoric acid.

Option 3

1. Which substance in the proposed series is superfluous:

a) AgNO 3 ; b) K 2 SO 4; c) KOH; d) Ca 3 (PO 4) 2?

2. When iron(III) hydroxide is heated, substances are formed, the formulas of which are:

a) Fe and H 2 O; b) FeO and H 2 O;

c) Fe 2 O 3 and H 2 O; d) FeO and H 2 .

3. A chemical reaction is possible between substances whose formulas are:

a) Hg and HCl; b) Fe and Ca(NO 3) 2;

c) Cu and AgNO 3 ; d) Zn and Al(NO 3) 3 .

4. General scheme of transformations

E -> E 2 O 5 -> H 3 EO 4

corresponds to the genetic series:

a) nitrogen -> nitric oxide (V) -> nitric acid;

b) aluminum -> aluminum oxide -> aluminum hydroxide;

c) calcium -> calcium oxide -> calcium hydroxide;

d) phosphorus -> phosphorus(V) oxide -> phosphoric acid.

Option 4

1. The basic oxides include a substance whose formula is:

a) CH 4 ; b) SiO 2 ; c) Na 2 O; d) NaOH.

2.

a) H 2 SO 4 and NaOH; b) K 2 CO 3 and Ca (OH) 2;

c) MgO and H 2 SO 4; d) NaOH and CuCl 2 .

3. Copper (II) oxide reacts with each of the two substances, the formulas of which are:

a) H 2 and HCl; b) FeCl 3 and H 2 SO 4;

c) NaOH and Cl 2 ; d) CO 2 and KNO 3.

4. General scheme of transformations

E -> E 2 O -> EON

corresponds to the genetic series:

a) lithium -> lithium oxide -> lithium hydroxide;

b) aluminum -> aluminum oxide -> aluminum hydroxide;

c) calcium -> calcium oxide -> calcium hydroxide;

d) phosphorus -> phosphorus(V) oxide -> phosphoric acid.

Option 5

1.

b) Na 2 O - LiOH - KNO 3;

c) Fe 2 O 3 - NaOH - Pb (OH) 2;

d) CaO - H 2 SO 3 - KOH.

2. Iron(II) hydroxide can be obtained by an exchange reaction between an alkali and a substance whose formula is:

a) FeS; b) FeSO 4 ; c) Fe 2 (SO 4) 3; d) FeCl 3 .

3. A reaction is possible between a substance and a solution:

a) Ag and K 2 SO 4 (solution); b) Zn and KCl (solution);

c) Mg and SnCl 2 (solution); d) Ag and CuSO 4 (solution).

4. In a chain of transformations

Na 2 O -> X -> NaCl

substance "X" can be:

a) HCl; b) NaOH; c) H 2 O; d) FeCl 3 .

Option 6

1. Substances arranged in the sequence oxide - hydroxide - salt are in the series:

a) P 2 O 5 - ZnSO 4 - Ba (OH) 2;

b) H 2 O - KOH - K 2 CO 3;

c) CaO - H 2 CO 3 - NaOH;

d) CaF 2 - NaOH - PbI 2.

2. When copper (II) hydroxide is heated, substances are formed, the formulas of which are:

a) Cu and H 2 O; b) CuO and H 2 O;

c) Cu 2 O and H 2 O; d) CuO and H 2 .

3. Potassium hydroxide solution reacts with each of the substances in the pair:

a) copper (II) chloride and sulfur oxide (IV);

b) copper(II) oxide and sulfuric acid;

c) nitric acid and barium carbonate;

d) zinc oxide and sodium chloride.

4. In a chain of transformations

P 2 O 5 -> X -> Na 3 PO 4

substance "X" can be:

a) NaCl; b) NaOH; c) H 2 O; d) H 3 PO 4 .

2. Iron(III) hydroxide precipitates when alkali solutions act on:

a) iron(II) oxide;

b) iron(III) oxide;

c) solutions of iron(II) salts;

d) solutions of iron(III) salts.

3. The sodium hydroxide solution reacts with each of the two substances in the pair:

a) iron(III) chloride and carbon dioxide;

b) iron(II) oxide and hydrochloric acid;

c) sulfuric acid and calcium carbonate;

d) zinc oxide and potassium chloride.

4. In a chain of transformations

KOH -> X -> Fe 2 O 3

substance "X" can be:

a) Fe(NO 3) 3; b) NaOH; c) H 2 O; d) Fe(OH) 3 .

2. An insoluble base and a salt are formed in an exchange reaction between substances, the formulas of which are:

a) H 3 PO 4 and NaOH; b) K 2 CO 3 and Ba (OH) 2;

c) ZnO and H 2 SO 4; d) KOH and FeCl 3 .

3. Iron(II) chloride reacts with each of the two substances in the pair:

a) Zn and AgNO 3 ; b) HNO 3 and CO 2;

c) CuO and CO 2 ; d) MgO and HCl.

4. In a chain of transformations

C -> X -> CaCO3

substance "X" can be:

a) CaO; b) Ca(OH) 2 ; c) H 2 O; d) CO 2 .

2. Two salts are formed in an exchange reaction between substances, the formulas of which are:

a) K 3 PO 4 and NaOH; b) K 2 CO 3 and BaCl 2;

c) ZnSO 4 and NaNO 3; d) KOH and FeCl 3 .

3.

starting materials	reaction products
1) K 2 O + H 2 SO 4. 2) CuSO 4 + KOH. 3) MgCO 3 + HNO 3. 4) Mg(OH) 2 + HNO 3 .	a) Mg (NO 3) 2 + CO 2 + H 2 O. b) Cu (OH) 2 + K 2 SO 4. c) Mg (NO 3) 2 + H 2 O. d) K 2 SO 4 + H 2 O.

4. In the transformation scheme

Al(OH) 3 X Al(OH) 3

substances "A" and "B" can be respectively:

a) Na 2 SO 4 and H 2 SO 4; b) K 2 SO 4 and KOH;

c) NaCl and HCl; d) HNO 3 and NaOH.

2. In order to obtain hydrogen and oxygen in the laboratory, it is necessary to take, respectively, the following reagents:

a) Cu and HCl; KClO 3 ; b) Zn and HCl; KMnO 4 ;

c) HCl; Na 2 O; d) H 2 O 2; HgO.

3. Establish a correspondence between the formulas of the starting substances and the reaction products.

starting materials	reaction products
1) Na 2 O + H 2 SO 4. 2) CuSO 4 + NaOH. 3) CaCO 3 + HCl. 4) Ca(OH) 2 + HCl.	a) CaCl 2 + CO 2 + H 2 O. b) Cu (OH) 2 + Na 2 SO 4. c) CaCl 2 + H 2 O. d) Na 2 SO 4 + H 2 O.

4. In the transformation scheme

FeCl 3 Fe(OH) 3 FeCl 3

substances "A" and "B" are respectively:

a) H 2 O, NaOH; b) NaOH, HCl;

c) H 2 O, HCl; d) NaOH, NaCl.

Answers

Test 1. Classification of oxides and their properties

Test 2. Classification of bases, their preparation and properties

Test 3. Classification of acids, their preparation and properties

Test 4. Classification of salts, their preparation and properties

Test 5. Amphoteric oxides and hydroxides

Test 6 genetic connection between the main classes of inorganic compounds

Final test

To be continued

This article will characterize potassium from the point of view of physics and chemistry. The first of these sciences studies the mechanical and external properties substances. And the second - their interaction with each other - is chemistry. Potassium is the nineteenth element in the periodic table. It belongs to This article will consider the electronic formula of potassium, and its behavior with other substances, etc. This is one of the most active metals. The science that deals with the study of this and other elements is chemistry. Grade 8 provides for the study of their properties. Therefore, this article will be useful for students. So, let's begin.

Characteristics of potassium in terms of physics

This is a simple substance, which under normal conditions is in a solid state of aggregation. The melting point is sixty-three degrees Celsius. This metal boils when the temperature reaches seven hundred and sixty-one degrees Celsius. The substance in question has a silvery-white color. Has a metallic sheen.

The density of potassium is eighty-six hundredths of a gram per cubic centimeter. It is a very light metal. The formula for potassium is very simple - it does not form molecules. This substance consists of atoms that are located close to each other and have crystal lattice. The atomic mass of potassium is thirty-nine grams per mole. Its hardness is very low - it can be easily cut with a knife, like cheese.

Potassium and chemistry

Let's start with the fact that potassium is a chemical element that has a very high chemical activity. You can’t even store it in the open air, as it instantly begins to react with the substances surrounding it. Potassium is a chemical element that belongs to the first group and the fourth period of the periodic table. It has all the properties that are characteristic of metals.

Interaction with simple substances

These include: oxygen, nitrogen, sulfur, phosphorus, halogens (iodine, fluorine, chlorine, bromine). In order, consider the interaction of potassium with each of them. The interaction with oxygen is called oxidation. During this chemical reaction, potassium and oxygen are consumed in a molar ratio of four parts to one, resulting in the formation of an oxide of the metal in question in the amount of two parts. This interaction can be expressed using the following reaction equation: 4K + O2 = 2K2O. When burning potassium, one can observe

Therefore, this reaction is considered qualitative for the determination of potassium. Reactions with halogens are named according to the names of these chemical elements: these are iodination, fluorination, chlorination, bromination. These interactions can be called addition reactions, since the atoms of the two different substances are combined into one. An example of such a process is the reaction between potassium and chlorine, which results in the formation of chloride of the metal in question. To carry out this interaction, it is necessary to take these two components - two moles of the first and one of the second. As a result, two moles of the potassium compound are formed. This reaction is expressed by the following equation: 2K + CI2 = 2KCI. With nitrogen, potassium can form compounds when burned in the open air. During this reaction, the metal in question and nitrogen are consumed in a molar ratio of six parts to one; as a result of this interaction, potassium nitride is formed in an amount of two parts. This can be shown as the following equation: 6K + N2 = 2K3N. This compound is a green-black crystals. With phosphorus, the metal in question reacts according to the same principle. If we take three moles of potassium and one mole of phosphorus, we get one mole of phosphide. This chemical interaction can be written as the following reaction equation: 3K + P = K3P. In addition, potassium is able to react with hydrogen, forming a hydride. As an example, the following equation can be given: 2K + H2 \u003d 2KN. All addition reactions occur only in the presence of high temperatures.

Interaction with complex substances

The characteristic of potassium from the point of view of chemistry provides for the consideration of this topic. Potassium is able to react with water, acids, salts, oxides. With all of them, the metal in question reacts differently.

potassium and water

This chemical element reacts violently with it. In this case, hydroxide is formed, as well as hydrogen. If we take two moles of potassium and water, we get the same amount and one mole of hydrogen. This chemical interaction can be expressed using the following equation: 2K + 2H2O = 2KOH = H2.

Reactions with acids

Since potassium is an active metal, it easily displaces hydrogen atoms from their compounds. An example would be the reaction that occurs between the substance in question and hydrochloric acid. To carry it out, you need to take two moles of potassium, as well as acid in the same amount. As a result, two moles and hydrogen - one mole are formed. This process can be written as follows: 2K + 2HCI = 2KCI + H2.

Potassium and oxides

With this group of inorganic substances, the metal in question reacts only with significant heating. If the atom of the metal that is part of the oxide is more passive than the one we are talking about in this article, an exchange reaction occurs, in fact. For example, if we take two moles of potassium and one mole of cuprum oxide, then as a result of their interaction, one mole of the oxide of the chemical element in question and pure cuprum can be obtained. This can be shown in the form of the following equation: 2K + CuO = K2O + Cu. This is where the strong reducing properties of potassium come into play.

Interaction with bases

Potassium is able to react with metal hydroxides, which are located to the right of it in the electrochemical series of activity. In this case, its restorative properties are also manifested. For example, if we take two moles of potassium and one mole of barium hydroxide, then as a result of the substitution reaction we will get substances such as potassium hydroxide in the amount of two moles and pure barium (one mole) - it will precipitate. The presented chemical interaction can be displayed as the following equation: 2K + Ba(OH)2 = 2KOH + Ba.

Reactions with salts

In this case, potassium still shows its properties as a strong reducing agent. Substituting the atoms of chemically more passive elements, it allows you to get a pure metal. For example, if you add to in the amount of two moles three moles of potassium, then as a result of this reaction we get three moles of potassium chloride and two moles of aluminum. This process can be expressed using an equation as follows: 3К + 2АІСІ3 = 3КІ2 + 2АІ.

Reactions with fats

If you add potassium to any organic matter of this group, it will also displace one of the hydrogen atoms. For example, when stearin is mixed with the metal in question, potassium stearate and hydrogen are formed. The resulting substance is used to make liquid soap. This is where the characterization of potassium and its interactions with other substances ends.

The use of potassium and its compounds

Like all metals, the one discussed in this article is necessary for many industrial processes. The main use of potassium occurs in the chemical industry. Due to its high chemical activity, pronounced alkali metal and reducing properties, it is used as a reagent for many interactions and obtaining a variety of substances. In addition, alloys containing potassium are used as coolants in nuclear reactors. The metal considered in this article also finds its application in electrical engineering. In addition to all of the above, it is one of the main components of fertilizers for plants. In addition, its compounds are used in a wide variety of industries. So, in gold mining, potassium cyanide is used, which serves as a reagent for separating valuable metals from ores. Phosphates of the chemical element under consideration are components of various cleaning products and powders. Matches contain chlorate of this metal. In the manufacture of films for old cameras, the bromide of the element in question was used. As you already know, it can be obtained by potassium bromination under the condition high temperature. In medicine, chloride of this chemical element is used. In soap making - stearate and other fat derivatives.

Obtaining the metal in question

Nowadays, potassium is mined in laboratories in two main ways. The first is to restore it from hydroxide with the help of sodium, which is chemically even more active than potassium. And the second is getting it from chloride, also with the help of sodium. If you add the same amount of sodium to one mole of potassium hydroxide, one mole of sodium alkali and pure potassium are formed. The equation for this reaction is as follows: KOH + Na = NaOH + K. To carry out the reaction of the second type, you need to mix the chloride of the metal in question and sodium in equal molar proportions. As a result, substances such as kitchen salt and potassium are formed in the same ratio. This chemical interaction can be expressed using the following reaction equation: KSI + Na = NaCl + K.

The structure of potassium

An atom of this chemical element, like all others, consists of a nucleus, which contains protons and neutrons, as well as electrons that revolve around it. The number of electrons is always equal to the number of protons that are inside the nucleus. If any electron detached or joined the atom, then it already ceases to be neutral and turns into an ion. They are of two types: cations and anions. The former are positively charged, while the latter are negatively charged. If an electron joins an atom, then it turns into an anion, but if any of the electrons leaves its orbit, the neutral atom becomes a cation. Since the serial number of potassium, according to the periodic table, is nineteen, there are the same number of protons in the nucleus of this chemical element. Therefore, we can conclude that there are nineteen electrons around the nucleus. The number of protons that are contained in the structure of an atom can be determined by subtracting the serial number of a chemical element from the atomic mass. So we can conclude that there are twenty protons in the potassium nucleus. Since the metal considered in this article belongs to the fourth period, it has four orbits on which electrons are evenly distributed, which are constantly in motion. The scheme of potassium is as follows: two electrons are located in the first orbit, eight in the second; as well as in the third, in the last, fourth, orbit, only one electron rotates. This explains the high level of chemical activity of this metal - its last orbit is not completely filled, so it tends to combine with any other atoms, as a result of which their electrons of the last orbits will become common.

Where can this element be found in nature?

Since it has an extremely high chemical activity, it is not found anywhere on the planet in its pure form. It can only be seen as part of a variety of compounds. potassium in earth's crust is 2.4 percent. The most common minerals containing potassium are salvinite and carnallite. The first has the following chemical formula: NaCl.KCl. It has a variegated color and consists of many crystals of various colors. Depending on the ratio of potassium chloride and sodium, as well as the presence of impurities, it may contain red, blue, pink, orange components. The second mineral - carnallite - looks like transparent, pale blue, light pink or pale yellow crystals. His chemical formula looks like this: KCl.MgCl2.6H2O. It is a crystalline hydrate.

The role of potassium in the body, symptoms of deficiency and excess

Together with sodium, it maintains the water-salt balance of the cell. It also participates in the transmission between the membranes of the nerve impulse. In addition, it regulates the acid-base balance in the cell and throughout the body as a whole. It takes part in metabolic processes, counteracts the occurrence of edema, is part of the cytoplasm - about fifty percent of it - the salt of the metal in question. The main signs that the body does not have enough potassium are swelling, the occurrence of a disease such as dropsy, irritability and disturbances in work. nervous system, retardation of reaction and memory impairment.

In addition, an insufficient amount of this trace element adversely affects the cardiovascular and muscular systems. A lack of potassium for a very long time can provoke a heart attack or stroke. But due to an excess of potassium in the body, an ulcer of the small intestine can develop. To balance your diet in such a way that you get a normal amount of potassium, you need to know what foods contain it.

Foods high in the micronutrient in question

First of all, these are nuts, such as cashews, walnuts, hazelnuts, peanuts, almonds. Also, a large amount of it is found in potatoes. In addition, potassium is found in dried fruits such as raisins, dried apricots, prunes. Pine nuts are also rich in this element. Also, its high concentration is observed in legumes: beans, peas, lentils. Seaweed is also rich in data chemical element. Other products containing given element in in large numbers are green tea and cocoa. In addition, it is found in high concentrations in many fruits, such as avocados, bananas, peaches, oranges, grapefruits, and apples. Many cereals are rich in the trace element in question. This is primarily pearl barley, as well as wheat and buckwheat groats. Parsley and Brussels sprouts are also high in potassium. In addition, it is found in carrots and melons. Onions and garlic have a considerable amount of the considered chemical element. Chicken eggs, milk and cheese are also high in potassium. The daily norm of this chemical element for the average person is from three to five grams.

Conclusion

After reading this article, we can conclude that potassium is an extremely important chemical element. It is necessary for the synthesis of many compounds in the chemical industry. In addition, it is used in many other industries. It is also very important for the human body, so it must be regularly and in the required amount to go there with food.