Chemistry
09. Investigation of a rate of reaction by a gas-collection method
- 00:40 Why is it better to clamp the syringe at a low height?
- 00:47 Why do you have to do this quickly?
- 00:57 What could happen if gas is allowed to continue to fill the syringe?
- 01:14 How do you produce a different concentration of HCl?
- 01:20 What is the relationship between the two variables?
a digital balance (pref. 3-decimal place but minimum 2dp)
eye protection
250 cm³ conical flask
100 cm³ gas syringe with delivery tube and rubber stopper
weighing boat
spatula
stopwatch
clamp and stand
50 cm³ measuring cylinder
| Hazard | Risk | Control measure |
|---|---|---|
2mol dm-3 HCl |
Contact with eyes or skin |
Eye: flood eye with tap water (10min) Skin: drench with water |
CaCO3 Powder |
Contact with eyes |
Flood with tap water (10min) See doctor if pain persists |