Rates of Reaction Experiment

Rates of Reaction Experiment – Design Type

Introduction:
In this experiment, Sodium Thiosulfate is reacted with Hydrochloric acid to study the affect of changing the concentration of one of the reactants, on the reaction rate. The products formed are Sodium Chloride, Water, Sulfur Dioxide and Sulfur.

Na2S2O3(aq) + 2HCl(aq) => NaCl(aq) + H2O + SO2(aq) + S(s)

As the precipitate of sulfur forms, it masks the cross-drawn on the filter paper and a time for the reaction to complete can be measured.

Hypothesis:
As the concentration of one of the reactants in a reaction increases, reaction rate also increases.

Aim:
To show the effect of concentration on rate of reaction.

Materials:
2 M HCl(aq) 2x Burette Stand and clamp
0.25 M Na2S2O3(aq) 10 mL measuring cylinder
Stop Watch 2 x Burette
Sheet Of White Paper with a Cross (pencil) Conical Flask


Method:
1. Placed 50mL of thiosulfate solution in the 250mL conical flask using the burette. Added ...