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Calcium carbonate reacts with strong acids such as Hydrochloric acid to give off carbon dioxide and water.
Member rating: No Rating | Words: | Submitted: Sat Jan 25 2003
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By Balal Tariq Calcium carbonate reacts with strong acids such as Hydrochloric acid to give off carbon dioxide and water. CaCo3 (s) + 2Hcl (aq) --> CaCl2 (aq) + H?O (l) + CO2 (g) Independent variable - Temperature of Hydrochloric acid. Dependent variable - Time taken to collect 100cm³ of carbon dioxide gas, from different temperatures of Hydrochloric acid. Controlled variables - 1. Concentration of hydrochloric acid (two molar). 2. Surface area of calcium carbonate chips (small). 3. Amount of hydrochloric acid (25cm³). Hypothesis I predict that as the temperature of the hydrochloric acid will increase, the rate of reaction will increase and the atoms in the hydrochloric acid will be more energetically favourable. The atoms will travel faster with energy, causing more collisions and the rate of carbon dioxide gas production will also increase. Justification and scientific backup The higher the temperature, the faster the reaction rate there will be. This is due to the kinetic theory. The more heat...
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