The Rate of Reaction Between Sodium Thiosulphate and Hydrochloric Acid

The Rate of Reaction Between Sodium Thiosulphate and Hydrochloric Acid

Hypothesis:

I believe that the resulting graph will like this:

[IMAGE]

· I know that the line will not go through the origin because at 0˚C

the two chemicals are still liquid therefore they will still react

together.

· I believe that as the temperature increases the rate of reaction

will also increase this coincides with the collision theory which

states that as the temperature increases the speed of the particles

and the amount of energy they have also increases this causes more

collisions to occur and therefore increases the chance of a reaction

taking place.

· I believe that the rate of reaction will continue to rise this is

because there are no other factors to limit the rate of reaction I

have also researched this reaction in my 'Chemistry Counts' exercise

book and on the internet and the graphs which I found did not level

off but instead kept rising.

· Once the temperature of the chemicals reaches around 90˚C the water

will begin to vaporise this will increase the concentration of the

chemicals therefore increasing the rate of reaction.

· I will not be able to measure the rate of reaction at high

temperatures because it is very hard to reproduce very high temps in

the laboratory.

Apparatus:

Pipette

Thermometer (accurate to one centigrade)

250ml Beaker

Stopwatch (accurate to 1 second)

Boiling Tube

Wire Gauze

Tripod

Bunsen burner

Paper

Plastic Sheet

Sodium thiosulphate (4 mole 40g/litre)

Hydrochloric acid (1 mole)

Method:

Safety goggles and lab coats must be worn because both of the

chemicals are harmful. In the experiment the one variable which will

be changed is temperature I will do this by heating the hydrochloric

acid and sodium thiosulphate in a water bath. I have decided to have

my temperature range between 15 and 50 however I am also going to take