Question

thás gas?
Give chemical equation of the reaction involved.
665 i usually liberated when an acid reacts with a metal ? How will you test for the presence of
6. While diluting an acid, why is it recommended that the acid should be added to water and not water to the
acid ?
29 What happens when an acid reacts with a metal hydrogencarbonate ? Write equation of the motion
takes place​

Answer 1

Answer:

Explanation: The first answer is hygrogen gas.....u can check its presence by the pop sound it gives when burning matchstick is brought near it.

We add acid to water drop by drop because this process releases lot of heat....as water is a good absorber of heat and it has a capacity to absorb heat till 100°C. But if we add water to acid then there is a chance that the the heat may cause the acid to spill out which is dangerous and the heat may break the container

When an acid reacts with metal hydrogen carbonate it gives rise to salt, carbon dioxide and water.

Acid+metal Hydrogen carbonate -------> salt+carbon dioxide+water

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