Mary would like to find the percentage composition of calcium carbonate in limestone. She added 0.10 g of limestone to 30 cm3 of 0.1 mol/dm3 hydrochloric acid. The resultant solution is then titrated against 0.1 mol/dm3 sodium hydroxide solution. 12 cm3 of sodium hydroxide solution is required to completely neutralize the excess acid. Find the percentage composition of calcium carbonate in the sample of limestone.
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