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chemistry igcse acapprinted 23 · PDF 23
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23
P4:
1. Calcium carbonate reacts with hydrochloric acid to form calcium chloride, carbon
dioxide, and water. Calculate the mass of calcium chloride produced when 10 g of calcium
carbonate reacts completely with excess hydrochloric acid.
2. Magnesium burns in oxygen to form magnesium oxide. If 4.8 g of magnesium reacts
completely, calculate the mass of magnesium oxide produced.
3. Sulfur reacts with oxygen to form sulfur dioxide. What volume of oxygen (at room
temperature and pressure) is needed to react completely with 32 g of sulfur?
4. Sodium hydroxide reacts with sulfuric acid to form sodium sulfate and water. 25 cm³ of
1.0 mol/dm³ sodium hydroxide solution reacts completely with 50 cm³ of sulfuric acid.
Calculate the concentration of the sulfuric acid solution.
5. Ethene (C₂H₄) reacts with oxygen to form carbon dioxide and water. A 0.05 mol sample
of ethene reacts with excess oxygen. Calculate the mass of carbon dioxide produced in this
reaction.