Investigating How Changing the Concentration of Hydrochloric Acid Affects the Rate of Reaction with Sodium Thiosulphate Solution

Investigating How Changing the Concentration of Hydrochloric Acid Affects the Rate of Reaction with Sodium Thiosulphate Solution

Aim

I aim to investigate how changing the concentration of Hydrochloric

acid affects the rate of reaction with Sodium Thiosulphate solution.

[IMAGE]Sodium + Hydrochloric Sodium + Water + Sulphur +

Sulphur

Thiosulphate Acid

Chloride Dioxide

(aq) (aq) (aq) (l)

(g) (s)

The reaction makes the solution go a yellow cloudy colour and a gas is

given off.

Procedure

To ensure that our results are precise accurate and reliable we are

going to take more than one set of results down and we will do the

test twice. If there appears to be a set of results that does not fit

the pattern we will repeat the test that it occurred in. We will also

make sure that the apparatus we are using gives an accurate

measurement. Also, in order to keep it a fair test, we will keep all

of the variables the same, except from one. This will be the distilled

water. We will use the same cross throughout the experiment. Otherwise

the shade of the cross could be different so it may take a different

period of time for the cross to totally disappear. To ensure that we

use the right amount of sodium thiosulphate and the same amount of

hydrochloric acid, we will use a pipette.