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Investigating the rate of reaction between potassium manganate (VII) solution and glucose solution.

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Introduction

Alex Cornwall-Tombs Chemistry investigation Investigating the rate of reaction between potassium manganate (VII) solution and glucose solution. Aim We are going to see if by varying the temperature of the potassium manganate solution and the glucose solution if it makes the experiment react faster or slower and if it takes a long or short time. Prediction I think that when the potassium manganate solution and the glucose solution is heated the reaction will speed up. ...read more.

Middle

Pre-tests The pre-tests are carried out to get a starting solution that is faster than the original mixture. I am doing this so I can speed up the results. I will use the same method as in my main method. Below are the tests I carried out: Amount of amount of amount of amount of time Potassium sulphuric water glucose (minutes) Manganate acid (ml) (ml) (ml) (ml) 4 25 50 10 21:33 takes to long 4 25 0 10 8:11 still to long 4 25 0 20 5:43 better 4 25 0 30 4:51 this is the one I will use 4 25 0 40 4:45 ok Method 1. ...read more.

Conclusion

2. Get a Bunsen burner, a heatproof mat, a tripod, gauze and a thermometer. Set up the apparatus and get some jugs to put the solutions into. Pour the glucose and the sulphuric acid into the beaker and heat the solution up. 3. Take the heat away and measure the temperature. Record this and add the potassium manganate. Once the potassium manganate has been put in start timing until the solution turns colourless. Results The results are averages of three experiments with the same temperatures Temperature of solution Time (oc) (secs) 34.3 55.3 44 38 52 20 64.7 7.3 73.7 5.3 ...read more.

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