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Question

Sodium carbonate reacts with ethanoic acid to form sodium ethanoate, carbon dioxide and water. In an experiment, 5.3 g of sodium carbonate reacted with 6 g of ethanoic acid to form 8.2 g of sodium ethanoate, 2.2 g of carbon dioxide and 0.9 g of water. Show that this data verifies the law of conservation of mass.

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Solution

2CH3COOH6 g+Na2CO35.3 g 2CH3COONa8.2 g+CO22.2 g+H2O0.9 g

Total mass of reactants = 6 g + 5.3 g = 11.3 g
Total mass of products = 8.2 g + 2.2 g + 0.9 g = 11.3 g

The total mass of the reactants = Total mass of the products.

So, from this, we can verify the law of conservation of mass.

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