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Preparation Using Zinc

Zinc metal re...

Question

Zinc metal reacts with dilute hydrochloric acid to form zinc chloride and liberate hydrogen gas

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Solution

Zinc is more reactive than hydrogen so placed above hydrogen in the reactivity series. Hence, it reacts with dilute HCl with the formation of metal salt and evolution of hydrogen gas takes place.

Zn (s) + 2HCl (aq) → ZnCl₂(aq) + H₂ (↑)
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Q. Balance the chemical equation by including the physical states of the substances for the following reactions.

a) Barium chloride and sodium sulphate aqueous solutions react to give insoluble Barium sulphate and an aqueous solution of sodium chloride.

b) Sodium hydroxide reacts with hydrochloric acid to produce sodium chloride and water.

c) Zinc pieces react with dilute hydrochloric acid to liberate hydrogen gas and forms zinc chloride

Q. Dilute hydrochloric acid reacts with zinc to evolve _____ gas along with the formation of zinc chloride salt.

Q. Consider the reaction between Zn and dilute hydrochloric acid forming zinc chloride and liberating hydrogen.

Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not. Why?

Balance the following reaction:

1.when ammonium hydroxide is added to a solvent of iron (II) Sulphate , a green ppt of iron (II) hydroxide and ammonium sulphate is formed.

2.Zinc reacts with dilute hydrochloric acid to form zinc chloride and hydrogen gas liberated.

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