Question

Zn>Na2[Zn(OH)4]>ZnCl2>Zn(OH)2>H2O>H2SO4>H2>HCl>H2S

Answer 1

1) Zn+NaOH+H2O=Na2[Zn(OH)4]+H2
2)Na2[Zn(OH)4]+HCl(изб.)=NaCl+ZnCl2+H2O
3)ZnCl2+NaOH=Zn(OH)2+NaCl
4)Zn(OH)2=ZnO+H2O
5)SO3+H2O=H2SO4
6)Mg+H2SO4(р-р)=MgSO4+H2
7)H2+Cl2=HCl
8)HCl+ZnS=ZnCl2+H2S

Answer 2

The given expression Zn > Na2[Zn(OH)4] > ZnCl2 > Zn(OH)2 > H2O > H2SO4 > H2 > HCl > H2S represents a series of chemical reactions or transformations involving different substances. Let's break down each component and explain its significance.

Zn (Zinc)

Zinc (Zn) is a chemical element with the atomic number 30. It is a bluish-white metal that is commonly used in various industries due to its corrosion resistance and ability to form alloys with other metals. In the given expression, Zn is the starting point for the series of reactions.

Na2[Zn(OH)4] (Sodium Zincate)

Sodium zincate (Na2[Zn(OH)4]) is a compound formed by the reaction of zinc oxide (ZnO) with sodium hydroxide (NaOH). It is an alkaline solution that contains the zincate ion ([Zn(OH)4]2-). Sodium zincate is often used in the synthesis of other zinc compounds.

ZnCl2 (Zinc Chloride)

Zinc chloride (ZnCl2) is a compound formed by the reaction of zinc with chlorine. It is a white crystalline solid that is soluble in water. Zinc chloride has various applications, including as a catalyst, a deodorant, and a wood preservative.

Zn(OH)2 (Zinc Hydroxide)

Zinc hydroxide (Zn(OH)2) is a compound formed by the reaction of zinc with water. It is a white solid that is sparingly soluble in water. Zinc hydroxide is used in the production of other zinc compounds and as a precursor to zinc oxide.

H2O (Water)

Water (H2O) is a chemical compound composed of two hydrogen atoms bonded to one oxygen atom. It is a universal solvent and plays a crucial role in various chemical reactions. In the given expression, water is involved in the reaction with zinc to form zinc hydroxide.

H2SO4 (Sulfuric Acid)

Sulfuric acid (H2SO4) is a strong acid that is widely used in industry. It is a colorless, oily liquid that is highly corrosive. Sulfuric acid is used in the production of fertilizers, dyes, detergents, and various other chemicals. In the given expression, sulfuric acid is more reactive than water and can displace zinc hydroxide.

H2 (Hydrogen Gas)

Hydrogen gas (H2) is a diatomic molecule composed of two hydrogen atoms. It is the lightest and most abundant element in the universe. Hydrogen gas is highly flammable and is used as a fuel in various applications, including in fuel cells and as a rocket propellant.

HCl (Hydrochloric Acid)

Hydrochloric acid (HCl) is a strong acid that is commonly used in laboratories and industry. It is a colorless, highly corrosive liquid. Hydrochloric acid is used in the production of various chemicals, including PVC, dyes, and pharmaceuticals.

H2S (Hydrogen Sulfide)

Hydrogen sulfide (H2S) is a colorless gas with a characteristic odor of rotten eggs. It is produced by the decomposition of organic matter and is commonly found in natural gas and volcanic gases. Hydrogen sulfide is toxic and flammable.

Please note that the given expression represents a series of reactions or transformations, and the ">" symbol indicates the relative reactivity or displacement of substances in these reactions. The order of substances in the expression suggests that each subsequent substance is more reactive or capable of displacing the previous substance in a chemical reaction.

Remember to always exercise caution when working with chemicals and follow proper safety protocols.