Question

17. When a sample of baking soda is strongly ignited in a crucible, it suffered a loss
of 3.1g. Find mass of baking soda is​

Answer 1

Answer:

The reaction is:

2NaHCO3→Na2CO3+H2O+CO2

The loss in weight is due to water and carbon dioxide.

2 moles (2×84g) of sodium bicarbonate gives 1  mole (18g) of water and 1 mole of carbon dioxide (44g).

Thus, decomposition of 168g of sodium bicarbonate will result in loss in weight of 18+44=62g

The loss in weight of 3.1 g corresponds to 62168×3.1=8.4g of sodium bicarbonate.

Explanation: