Name: Preparation of Carbon Dioxide
Uploaded: 2019-07-19
Duration: 2 min 51 s
Description: Carbon dioxide is produced whenever an acid reacts with a carbonate. This makes carbon dioxide easy to make in the laboratory. Carbon dioxide can be collecte...

Question

Lighted candles of different lengths are arranged in a trough as shown in the figure. Pour a saturated solution of sodium bicarbonate (baking soda) into the trough. Add a little vinegar to the solution. What do you observe? Give reasons for the observations.

Accepted Answer

A saturated solution of sodium bicarbonate (baking soda) on reaction with vinegar ( $5 - 8 %$ solution of ethanoic acid or acetic acid) produces carbon dioxide gas. It acts as a fire extinguisher. Hence, the smallest candle put off first followed next and largest at the end.

The reaction between baking soda and vinegar is as follows:

$\underset{Sodium bicarbonate}{{NaHCO}_{3}} + \underset{Acetic acid}{{CH}_{3} COOH} \to \underset{Sodium acetate}{{CH}_{3} COONa} + \underset{Carbon dioxide}{{CO}_{2} ↑} + \underset{Water}{H_{2} O}$

Lighted candles of different lengths are arranged in a trough as shown in the figure. Pour a saturated solution of sodium bicarbonate (baking soda) into the trough. Add a little vinegar to the solution. What do you observe? Give reasons for the observations.

Important Questions on The World of Carbon

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