Chemistry
16. Determination of the order of a reaction
- 00:50 With which reagent is the thiosulfate reacting?
- 01:04 Why does it take time for the blue-black colour to appear?
- 01:19 What sort of line do you expect?
- 01:19 What is the relationship between the two variables?
stopwatch
100 cm3 conical flask
stirring rod
4 x 10 cm3 measuring cylinder
5 cm3 measuring cylinder
1 cm3 measuring cylinder
10.0 cm3 H2SO4 solution
10.0 cm3 Na2S2O3 solution
15.0 cm3 Kl solution
1.0 cm3 starch solution
9.0 cm3 de-ionised water
| Hazard | Risk | Control measure |
|---|---|---|
0.1 mol dm-3 H2O2 solution –no hazard. |
Contact with eye or skin |
Eye: flood eye with water (10 min). See doctor. Skin: flood area with plenty of water. |
1.0 mol dm-3 H2SO4 solution – irritant |
Contact with eye or skin |
Eye: flood eye with water (10 min). See doctor. Skin: flood area with plenty of water. |
0.1 mol dm-3 KI solution – no hazard |
Contact with eye or skin |
Eye: flood eye with water (10 min). See doctor. Skin: flood area with plenty of water |
0.005 mol dm-3 Na2S2O3 solution – no hazard |
Contact with eye or skin. |
Eye: flood eye with water (10 |