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Chemistry- PLAN for the investigation into the affect of the concentration of Sodium Thiosulphate on it's rate of reaction with hydrochloric acid. Rates of reactions are affected by four main factors of reactants which are the size of the particles of the reactant, the temperature of the reactant, the concentration of the reactant and adding a catalyst into the solution. As shown by the title the main one which will be focused on in this planning and experiment is the concentration of the solution of sodium thiosulphate. This affects the rate of reaction as the more concentrated reactant 1 is the more particles of the acid there are which come into contact with reactant 2, and then this means more particles from reactant 1 are reacting with reactant 2 and so this means the rate of the reaction is faster. APPARATUS: DIAGRAM: 160cm3 of sodium thiosulphate 110cm3 of water 5cm3 of hydrochloric acid at...

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