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Determine the percentage composition of a mixture of anhydrous sodium carbonate and sodium bicarbonate from the following dataWeight of mixture weight of mixture Taken= 2 gram , loss in weight on heating= 0.124 g
When the mixture of sodium carbonate and sodium bicarbonate (2 g) is heated, then sodium bicarbonate decomposes to give sodium carbonate, water and carbon-di-oxide, which are evolved as gases. Therefore the loss in the weight (0.124 g) of the mixture will be due to evolution of theses gases 62 g (18g+44g) of gas is produced from 168 g of Sodium Bicarbonate.Therefore, 0.124 g of gas will be produced form (0.124x168)/62 = 0.336 g of Sodium Bicarbonate.The weight of sodium bicarbonate is 0.336 g, so, weight of sodium carbonate will be (2g-0.336g) = 1.664g.(2).
When the mixture of sodium carbonate and sodium bicarbonate (2 g) is heated, then sodium bicarbonate decomposes to give sodium carbonate, water and carbon-di-oxide, which are evolved as gases. Therefore the loss in the weight (0.124 g) of the mixture will be due to evolution of theses gases
62 g (18g+44g) of gas is produced from 168 g of Sodium Bicarbonate.
Therefore, 0.124 g of gas will be produced form (0.124x168)/62 = 0.336 g of Sodium Bicarbonate.
The weight of sodium bicarbonate is 0.336 g, so, weight of sodium carbonate will be (2g-0.336g) = 1.664g.
(2).
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