Investigating Reaction Rates of Sodium Thiosulphate and Hydrochloric Acid

Investigating Reaction Rates of Sodium Thiosulphate and Hydrochloric

Acid

Aim:

To investigate the rate of reaction of Sodium Thiosulphate and

Hydrochloric acid. In this investigation I will be varying the

concentration of Sodium Thiosulphate only and not the Hydrochloric

acid concentration.

In this investigation I will use the following word equation:

Sodium Thiosulphate + Hydrochloric acid

In this investigation I will use the following symbol equation:

Na2S2O3 + Hcl

Prediction:

I predict that as the Sodium Thiosulphate concentration increases the

rate of reaction will also increase.

The reason I predict this is because there will be a higher

concentration of particles and so a faster reaction would be able to

occur- so the reaction rate would increase. There will be more

particles of Sodium Thiosulphate and Hydrochloric acid in a small

volume and so more collisions are likely to occur which in turn cause

a quicker rate of reaction.

In this investigation I used 25cm cubed of Sodium Thiosulphate and 5cm

cubed of Hydrochloric acid.

Health and Safety:

In order to make this investigation as safe as possible for myself I

took a number of precautions.

The first precaution that I took was to wear a lab coat and goggles.

The lab coat would protect my clothes from any acid spills or splashes

that may occur and the goggles would protect my eyes from being

affected by any acid spills or splashes.

Scientific Theory:

My prediction has been based on my scientific theory. In the

investigation I carried out a chemical reaction occurred.

A chemical reaction is when two substances collide with ...

... middle of paper ...

...he volume of the Hydrochloric acid

that can be reacted with the Sodium Thiosulphate. I would change these

things in order to compare the results between the two different

investigations and also to observe what difference different

concentrations make on both investigations.

If I had obtained any anomalous results I would have repeated those

concentrations of Sodium Thiosulphate to find out why those results

were anomalous.

If could have repeated the investigation the exact same way once or

twice more to make sure my results are correct by comparing all the

different results that I would have got.

I also could have used a wider range of concentrations of Sodium

Thiosulphate in order to help me prove that my prediction was correct

and also to check that the results were same to what I had already

obtained.