Name: All About Salts
Uploaded: 2019-07-19
Duration: 7 min 37 s
Description: In chemistry, salt is defined as an inorganic or organic compound with ionic bonds. Let's study in detail the properties of salts in this video.

Question

Describe an activity with diagram to illustrate that the reaction of metal carbonates or metal hydrogen carbonates with acids produces carbon dioxide. Write the relevant equations of all the reactions that take place. Name any two forms in which calcium carbonate is found in nature.

Accepted Answer

It can be explained using the following activity:

Take a small amount of calcium carbonate in a test tube and add dilute $HCl$ in it. Reaction immediately starts and it is accompanied by brisk effervescence. This shows that certain gas has evolved. That is, $\underset{Calcium carbonate}{{CaCO}_{3}} + \underset{Hydrochloric acid}{HCl} \to \underset{Calcium chloride}{{CaCl}_{2}} + \underset{Water}{H_{2} O} + \underset{Carbon dioxide}{{CO}_{2}}$

When the gas is bubbled through lime water, it immediately becomes milky because of the formation of calcium carbonate. This shows that the gas evolved is ${CO}_{2}$ _. $\underset{Lime water}{Ca (OH)_{2}} + \underset{Carbon dioxide}{{CO}_{2}} \to \underset{Calcium carbonate (ppt)}{{CaCO}_{3}} + \underset{Water}{H_{2} O}$

The milkiness disappears when excess gas is bubbled through lime water because of the formation of calcium hydrogen carbonate. It is water-soluble and the milkiness slowly disappears. That is, $\underset{Calcium carbonate}{{CaCO}_{3}} + \underset{Carbon dioxide}{{CO}_{2}} + \underset{Water}{H_{2} O} \to \underset{Calcium bicarbonate}{Ca ({HCO}_{3})_{2}}$

Calcium carbonate is a compound commonly found as a white mineral which occurs naturally in marble, chalk and limestone.

Describe an activity with diagram to illustrate that the reaction of metal carbonates or metal hydrogen carbonates with acids produces carbon dioxide. Write the relevant equations of all the reactions that take place. Name any two forms in which calcium carbonate is found in nature.

Important Questions on Acids, Bases and Salts

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