Answer the following question when zinc granules with dilute sulphuric acid.
1. How do you come to to know whether the chemical reaction take place or not?
2. Which gas is evolved in this reaction?
3. How can you test the gas evolved in this reaction?
4. Write the chemical reaction involved in this reaction?
5. Is the reaction exothermic? how can you say that.
Answers
Answered by
4
Explanation:
i) Zinc reacts with dilute sulphuric acid(H
2
SO
4
) to form zinc sulphate (ZnSO
4
) and hydrogen(H
2
) gas.
Zn(s)+H
2
SO
4
(aq)→ZnSO
4
(aq)+H
2
(g)
ii) Zinc reacts with hydrochloric acid to form zinc chloride(ZnCl
2
) and hydrogen(H
2
) gas.
Zn(s)+2HCl(aq)→ZnCl
2
(aq)+H
2
(g)
iii) Zinc reacts with sodium hydroxide to form sodium zincate(Na
2
ZnO
2
) and hydrogen(H
2
).
Zn(s)+2NaOH(aq)→Na
2
ZnO
2
(aq)+H
2
(g)
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