The Effect of Temperature on the Rate of Reaction

The Effect of Temperature on the Rate of Reaction

Aim: To investigate the effect of temperature on the speed of reaction

between:

Sodium thiosulphate 25ml

Hydrochloric acid 5ml

Sodium thiosulphate + Hydrochloric acid à Sodium chloride + Sulphur

dioxide + Sulphur + Water

Apparatus:

· Beaker

· Stopwatch

· Thermometer

· 25ml of Sodium thiosulphate

· 5ml of Hydrochloric acid

· Water bath

Safety: Wear goggles at all times just in case a chemical splashes

into your eye.

Method:

Measure the Sodium thiosulphate and pour it into the beaker. Place the

beaker into the water bath and wait until it reaches the temperature

you are starting the experiment with. Measure the Hydrochloric acid

and take the beaker out of the water bath. Pour the acid into the

beaker. As soon as you do this, start the stopwatch. Record how long

the reaction takes. Once the 'X' that is marked underneath the beaker

is not visible, the reaction has been completed.

Repeat this for the temperatures 30â—¦c, 40â—¦c, 50â—¦c and 60â—¦c. Write down

your results in a results table.

I will make this experiment a fair test by using the same measurement

of chemicals in all the experiments. If I don't do this, my results

will not be accurate and they may or may not make a pattern in my

readings. I expect the reaction to happen faster as the temperatures

increase; as I know that the more heat given off creates more energy

which makes the particles collide more frequently. Therefore making

the reaction faster.

Results:

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The above are results from my experiment. I have repeated my

observations twice and plotted them on the graph. The 1st experiment

is in red and the 2nd in purple.

Conclusion:

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From doing this experiment I have learnt that as the temperature gets

higher the reaction gets faster. I thought this would happen as I

mentioned in my method, as lots of energy comes from the heat.