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Find out the effect of concentration on the rate of reaction between marble chips and acid.
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Chemistry Coursework Task Plan and carry out an investigation to find out the effect of concentration on the rate of reaction between marble chips and acid. Do not take anything away with you from the lab that you write during the lesson! Background Knowledge Marble is the chemical Calcium carbonate. The general equation for an acid reacting with a carbonate is: Acid + carbonate Salt + Water + Carbon dioxide I have decided to use Hydrochloric acid. So this equation becomes: Hydrochloric acid + Calcium carbonate Calcium chloride + water + Carbon dioxide The symbol equation for this reaction is: 2HCl + CaCo CaCl + H O + CO When acid is added to the marble, fizzing will be observed because a gas is being made. If a gas is allowed to escape the mass will decrease. The gas could be collected by using water displacement or a gas syringe. Providing there is enough acid the marble chips will disappear as the calcium...
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