Explain why (a)Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid, whereas copper does not? (b) We store silver chloride in dark coloured bottles?
Answers
Answer:
Answer:
Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid whereas copper does not because it depends on the reactivity of metal to get the hydrogen gas as the product with dilute acid. When zinc react with "dilute hydrochloric acid" it forms zinc chloride with hydrogen gas.
b)Silver chloride is a light-sensitive chemical compound andit easily undergoes photolytic decomposition reaction. Silver chloride decomposes into silver and chlorine gas when exposed to sunlight. Hence Silver chloride is stored in dark-colored bottles.
Explanation:
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(a)Zinc reacts with hydrochloric acid to liberate Hydrogen gas as it is more reactive than Hydrogen and hence, displace it. Copper is less reactive when compared to Hydrogen and hence cannot displace it.
The same can be understood by looking at the activity series of metals. The activity series of metals refers to the list of metals ranked in the decreasing order of their reactivity in order to displace Hydrogen gas from water or acid solutions. It helps us in predicting which metal will displace which metal in Acidic solutions.
Zinc lies above Hydrogen whereas Copper lies below Hydrogen.
(B)Why silver chloride is stored in dark colored bottles?
answer- Silver chloride is a light-sensitive chemical compound andit easily undergoes photolytic decomposition reaction.Silver chloride decomposes into silver and chlorine gas when exposed to sunlight. Hence Silver chloride is stored in dark-colored bottles.
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