Chemistry
Distinguish between the following as directed.
(a) Sodium carbonate and sodium sulphate using H2SO4.
(b) Lead (II) oxide and zinc oxide using H2SO4.
Sulphuric Acid
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Answer
(a) Sodium carbonate reacts with sulphuric acid and gives white coloured sodium sulphate along with water and carbon dioxide.
Na2CO3 + H2SO4 ⟶ Na2SO4 + H2O + CO2
On the other hand sodium sulphate reacts with sulphuric acid and gives colourless sodium hydrogen sulphate. Hence, the two can be distinguished.
Na2SO4 + H2SO4 ⟶ 2NaHSO4
(b) Lead oxide reacts with sulphuric acid and gives white coloured lead sulphate along with water.
PbO + H2SO4 ⟶ PbSO4 + H2O
On the other hand zinc oxide reacts with sulphuric acid and gives colourless zinc sulphate along with water.
ZnO + H2SO4 ⟶ ZnSO4 + H2O
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