When a sample of baking soda is strongly ignited
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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
Answered by admin @
Explanation:
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.
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