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In this investigation I am trying to find out how the concentration of sodium thiosulphate affects the rate of reaction.
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Chemistry coursework Planning In this investigation I am trying to find out how the concentration of sodium thiosulphate affects the rate of reaction. In my experiment I will use sodium thiosulphate and hydrochloric acid to time how long it takes for a cross to disappear. I will also use water to change the concentration of the sodium thiosulphate. The sodium thiosulphate and the hydrochloric acid react together resulting in sodium chloride, sulphur dioxide, sulphur and water being produced. Sulphur is a fine yellow precipitant and the cross disappears when enough sulphur forms to blot it out. sodium + hydrochloric sodium + sulphur + sulphur + water thiosulphate acid chloride dioxide Na 2S 2O 3 (aq) + 2HCl (aq) 2NaCl (aq) + SO2 (g) + S (s) + H2O (l) Preliminary work I have first done some preliminary experiments to help me to decide how I am going to carry out the investigation. The...
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