Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

Experiment to find how different concentrations affect the rate of a chemical reaction Aim: To find out how different concentrations of Sodium Thiosulphate (Na?S2O3) affect its reaction with HCL. The rate of a reaction depends on four things: 1. Temperature 2. Concentration 3. Catalyst 4. Surface area We can measure the speed of a reaction using the precipitate formed as a product of the reaction. By observing a marker through the solution, we can measure how long it takes before the marker is no longer visible. I am going to measure the rate of reaction with the concentration of the solution. Preliminary work: To investigate different amounts of HCL so I can find the best amount to use in my experiment I am going to test 40cm³ of Sodium Thiosulphate with 10cm³ and 20cm³ of HCL and then with 5cm³ and 10cm³ of HCL. After doing the preliminary investigation I got the following results: Na2S2O3 HCL Result 40cm³ 10cm³ Faster 40cm³ 20cm³ Na2S2O3 HCL Result 40cm³ 5cm³ 40cm³ 10cm³ Faster In my preliminary investigation I found...

To see the full version of this document, and 145,841 others