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The aim of this investigation is to look at the effect of varying concentration on the reaction between Zinc and Hydrochloric Acid.

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Introduction

GCSE Chemistry Investigation Aim: The aim of this investigation is to look at the effect of varying concentration on the reaction between Zinc and Hydrochloric Acid. Factors I will be investigating: * I will be investigating the rate of reaction by varying acid concentration * I will also be investigating the effect of varying concentration on metal-acid reactions. Prior Knowledge to investigation: This section of the planning is what I already know prior to the investigation, so I know what factors must be taken into account: * I know that some metals react with acids to produce hydrogen gas, and due to its explosive nature, safety procedures will have to be taken into account such as safety goggles. ...read more.

Middle

The collision theory supports the fact that reactions occur when particles collide with each other. This can be supported by the results of the experiment on the effect of concentration on reaction rates. This means that when solutions are more concentrated, the speed of a reaction is faster; A more concentrated solution means that there are more reactant particles in a given volume, meaning collisions will occur more often. The more often they collide, the more chance particles have of reacting, proving that the rate of chemical reaction will increase if the concentration of the reactants is increased. As this affects the rate of reaction, the concentration will need to be controlled to conduct a fair test. ...read more.

Conclusion

* I will have to wear safety goggles due to the explosive nature of Hydrogen gas and also to protect my eyes from any other unsafe chemical. Prediction: I believe that as the concentration of the acid increases that the rate of reaction will increase, because a higher concentration in acid means that there is a larger amount of molecules in the solution that are reacting with the Zinc. Results of the Experiment: 3 mol: Minutes Amount of Hydrogen 0 0 1 2 15 3 4 31 5 6 47 7 8 57 9 10 65 4mol: Minutes Amount of Gas 0 0 1 2 9 3 4 16 5 6 24 7 8 30 9 10 36 Minutes Amount of Gas 0 0 1 2 3 4 16 5 6 24 7 8 30 9 10 36 ...read more.

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