Chemistry
18. Titration using a pH-probe
- 00:31 Why is it important to swirl the beaker?
- 01:07 Why is it important to wash the electrode?
- 01:25 How do you identify the equivalence point?
de-ionised water
0.1 mol dm-3 HCl solution
0.1 mol dm-3 CH3COOH solution
0.1 mol dm-3 NaOH solution
0.1 mol dm-3 NH3
25.0 cm3 volumetric pipette with safety filler
50.0 cm3 burette and funnel
burette clamp and stand
100 cm3 beaker
250 cm3 conical flask
pH-meter
data logger (optional)
buffer solution (pH 4)
buffer solution (pH9)
| Hazard | Risk | Control measure |
|---|---|---|
buffer solution (pH 4) - irritant |
contact with eyes and skin |
Flood eye with tap water (10min). Skin: drench with water |
buffer solution (pH9) - irritant |
contact with eyes and skin |
Flood eye with tap water (10min). Skin: drench with water. |
0.1 mol dm-3 HCl solution – no hazard. |
contact with eyes and skin |
Flood eye with tap water (10min). Skin: drench with water |
0.1 mol dm-3 CH3COOH solution – no hazard. |
contact with eyes and skin |
Flood eye with tap water (10min). Skin: drench with water. |
0.1 mol dm-3 NaOH solution – no hazard. |
contact with eyes and skin |
Flood eye with tap water (10min). Skin: drench with water. |
0.1 mol dm-3 NH3 – no hazard. |
contact with eyes and skin |
Flood eye with tap water (10min). Skin: drench with water. |