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Rates of reactions tell us how quickly a chemical reaction happens. A reaction happens when two different particles collide successfully.
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Chemistry Investigation Plan Rates of reactions tell us how quickly a chemical reaction happens. A reaction happens when two different particles collide successfully. There are a number of factors which change the speed rate of a chemical reaction, these include * Temperature * Surface Area * Concentration * Catalyst Effect of Concentration A more concentrated solution reacts more quickly. The hydrochloric acid particles can only react with the sodium thiosulphate particles when they collide. The hydrochloric particles and sodium thiosulphate particles move randomly through the liquid. As you increase the concentration of the sodium thiosulphate there will be more particles in the same volume of solution. Therefore there is a greater chance of the sodium thiosulphate particles colliding, and reacting with the hydrochloric particles. This would lead to a faster reaction. Effect of Temperature When the solution is hotter the particles have more energy. The particles move around more quickly. As the particles travel faster, there are more collisions...
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