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Copy and complete the following table. Column 3 has the names of gases to be prepared using the substance you enter in Column 1, alongwith dilute or concentrated sulphuric acid, as indicated in Column 2.

Column 1

Column 2

Column 3

Substance reacted
with acid

Dilute or concentrated
sulphuric acid

Gas

hydrogen

carbon dioxide

only chlorine

Write the equation for the laboratory preparation of:
(i) Sodium sulphate using dilute sulphuric acid.
(ii) Lead sulphate using dilute sulphuric acid.

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Solution

Column 1 Column 2 Column 3
Substance reacting
with acid
Dilute or concentrated
sulphuric acid
Gas
Metals (zinc) Dilute sulphuric acid Hydrogen
Metallic carbonates (calcium carbonate) Dilute sulphuric acid Carbon dioxide
Bleaching powder Dilute sulphuric acid Only chlorine

Given below are the balanced chemical equations for the laboratory preparation of:

(i) Sodium sulphate using dilute sulphuric acid:

Na2SO3 + H2SO4 → Na2SO4 + H2O + SO2

(ii) Lead sulphate using dilute sulphuric acid:

Pb(NO3)2 + H2SO4 → PbSO4↓ + 2HNO3


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