ellabarker99

Thank you, I'm at GCSE level though, so I think that using grams is fine:) thank you for you're help. the question 'how does that amount of salt placed in 25ml of water effect the temperature change?"

for our chemistry controlled assessment, we had to choose a salt and perform an experiment that would effect the temperature change of a salt mixed with water. we chose to use potassium chloride. the amount of water we used was 25ml, which remained constant for each test we did. we performed the test over 7 different values of salt, from 0.5 - 6g and we repeated each test 3 times to ensure accuracy. Here is a table of our results. All of the temperatures were measured in degrees Celsius. amount of salt. (g) starting temperature. end temperature. temperature difference 0.5. 25. 24.5. -0.5 0.5. 24. 23. -1 0.5. 25. 24. -1 1. 24. 23. -1 1. 24. 23. -1 1. 23.5. 22. -1.5 2. 23. 20. -3 2. 23. 20. -3 2 22. 19.5. -2.5 3. 22. 18. -4 3. 24.5. 20.5. -4 3 23. 18. -5 4. 23.5. 18. -5.5 4. 23. 16.5. -6.5 4. 24.5. 18. -6.5 5. 24.5. 16. -8.5 5. 23.5. 15.5. -8 5. 25. 17. -8 6. 23.5. 15. -8.5 6. 22. 13. -9 6. 23.5. 15. -8.5

our endothermic and exit heroic tests using potassium chloride