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How Concentration Affects The Rate of a Reaction The aim of this investigation is to determine whether if changing the concentration of a solution (hydrochloric acid) will affect the rate of which the reaction it occurs with another reactant (calcium carbonate). To do this I will need to research what the rate of a reaction is, the "collision theory", "activation energy" and the factors that affect the rate of a reaction. Also I will carry out a series of preliminary tests in preparation for my investigation. A reaction can only take place when a successful collision is occurred, so for a reaction to take place two different elements have to concur with each other, this depends on the amount of atoms and energy in the two elements, this is called a successful collision. A chemical reaction can only take place when two different elements collide with each other. What is...

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