Investigating Some Factors Which Affect the Rate of Reaction Between Hydrochloric Acid and Sodium Thiosulphate Background Information Reactions can be completed at different rates. The rate of reaction is measured by observing how quickly reactants are used up or how quickly products are forming. This can be calculated in three ways: oPrecipitation - When the products of the reaction is a precipitate, which will cloud the solution. Observing a marker through the solution and timing …showed first 75 words of 876 total…

…showed last 75 words of 876 total…Graph showing Predictions of the Effect of Concentration on Rate of Reaction: This qualitative graph concludes predictions for the following investigation. The final graph of results is believed to be directly proportional as when the concentration is at exactly zero, so will the rate of reaction be. This graph states that concentration and rate of reaction have a direct relationship with each other, when the concentration is doubled, the rate of reaction will also double.