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Calculations involving masses

Calculations involving masses

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Question 110

In the industrial production of washing soda, sodium hydrogencarbonate is thermally decomposed to yield sodium carbonate (Na2CO3\text{Na}_2\text{CO}_3Na2​CO3​) as the desired product, according to the following equation:

2NaHCO3(s)→Na2CO3(s)+H2O(g)+CO2(g) 2\text{NaHCO}_3(\text{s}) \rightarrow \text{Na}_2\text{CO}_3(\text{s}) + \text{H}_2\text{O}(\text{g}) + \text{CO}_2(\text{g}) 2NaHCO3​(s)→Na2​CO3​(s)+H2​O(g)+CO2​(g)

Calculate the atom economy for the production of sodium carbonate in this reaction.

You must show your working. Give your answer to 3 significant figures. (Relative atomic masses, ArA_rAr​: H=1\text{H} = 1H=1, C=12\text{C} = 12C=12, O=16\text{O} = 16O=16, Na=23\text{Na} = 23Na=23; relative formula mass, MrM_rMr​: sodium carbonate = 106)

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Calculations involving masses Questions

  1. GCSE
  2. /Chemistry
  3. /Calculations involving masses

258 exam-style questions on Edexcel GCSE Chemistry Calculations involving masses. Each one has a worked solution and a mark scheme showing where the marks go.

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