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FACTORS AFFECTING THE AMOUNT OF CARBON DIOXIDE GIVEN OFF WHEN A CARBONATE REACTS WITH AN ACID Introduction ACID + METAL CARBONATE --> METAL SALT + WATER + CARBON DIOXIDE When an acid reacts with a metal carbonate, a metal salt, water and carbon dioxide are produced. The amount of carbon dioxide produced depends on various factors. The aim of this experiment is to find out how much Carbon Dioxide (CO2) is given off when different masses of Calcium Carbonate (CaCO3) are reacted with Hydrochloric acid (HCl). The factors affecting the amount of CO2 produced are listed below. Variables Continuos Variables Variable Temperature Very hard to keep constant. Amount of acid As long as there is excess for all carbonate to react, it is therefore not relevant. Concentration of acid Any acid as long as there are enough H+ ions in the acid to react with carbonate. Pressure Hard to keep constant. Surface area Hard to measure surface area of powdered Calcium Carbonate. Rate of stirring Hard...

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