Why when lumps of calcium carbonate are added to dilute sulphuric acid, only a few bubbles of gas are seen?

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Solution

When a lump of calcium carbonate is added to dilute sulphuric acid only a few bubbles are seen because when calcium carbonate reacts with sulphuric acid calcium sulphate will form which will be again an insoluble substance and hence the production of carbon dioxide will also be affected and it will be less.
The chemical reaction is as follows-
${CaCO}_{3} + H_{2} {SO}_{4} \to {CaSO}_{4} + H_{2} O + {CO}_{2}$
This carbon dioxide will be produced in the form of bubbles.

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Question 18

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(a) Lime water turns milky on passing carbon dioxide gas into it.
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(a) Sulphuric acid forms two types of salts with NaOH,

(b) Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide,

(d) Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.

What do you observe when

(a) dilute sulphuric acid is added to granulated zinc ?

(b) a few pieces of iron are dropped in a blute solution of sodium chloride ?

(d) ferrous sulphate solution is added to an aqueous solution of sodium hydroxide.

(e) solid lead nitrate is heated ?

(f) when dilute sulphuric acid is added to barium chloride solution ?

Q. Why are bubbles formed when acetic acid is added with a solution of sodium hydrogen carbonate

Which gas is given off when dilute hydrochloric acid is added to calcium carbonate?

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