A-LevelChemistryAtoms, molecules and stoichiometryOct/Nov 2015Paper 1 Q161 Mark
Use of the Data Booklet is relevant to this question. Brine is concentrated aqueous sodium chloride. In the commercial electrolysis of brine, the products are chlorine, hydrogen and sodium hydroxide. What is the maximum yield of each of these products when 58.5 kg of sodium chloride are electrolysed as brine?
Ayield of chlorine/kg: 35.5, yield of hydrogen/kg: 1, yield of sodium hydroxide/kg: 40
Byield of chlorine/kg: 35.5, yield of hydrogen/kg: 2, yield of sodium hydroxide/kg: 40
Cyield of chlorine/kg: 71, yield of hydrogen/kg: 1, yield of sodium hydroxide/kg: 40
Dyield of chlorine/kg: 71, yield of hydrogen/kg: 2, yield of sodium hydroxide/kg: 80
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The correct answer is A. This question tests the candidate's understanding of atoms, molecules and stoichiometry within the Chemistrysyllabus. The examiner's mark scheme requires...
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