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A few chemical changes are given below...

A few chemical changes are given below . Write the formulae of the substances involved I those changes.
(a) Baking soda on strong heating produces sodium carbonate , carbon dioxide and water vapour.
(b) Marble on heating gives calcium oxide and carbon dioxide.
( C ) Rust (iron oxide ) is formed when iron reacts with oxygen in the atmospheric air.

Text Solution

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(a) Formula of baking soda is `NaHCO_(3)`. Its chemical name is sodium bicarbonate. The formula of sodium carbonate is `Na_(2)CO_(3)` and those of carbon dioxide and water are `CO_(2) and H_(2)O`, respectively.
(b) Marble contains calcium carbonate. Its formula is `CaCO_(3)`. The formulae of products are CaO (calcium oxide) and `CO_(2)` (carbon dioxide).
(c ) Formula of iron and oxygen are Fe and `O_(2)`, respectively. The formula of iron oxide formed is `Fe_(2)O_(3)`.
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