Chemistry
06. Double titration
- 00:22 Why not add both indicators at the start?
- 00:22 Why use phenolphthalein first?
- 00:33 Why is it important not to agitate the flask more than necessary?
- 00:47 Why is a white tile useful?
50 cm³ burette and funnel
burette clamp and stand
5 cm³ bulb / volumetric pipette with safety filler
2 x 250 cm³ conical flask
white tile
| Hazard | Risk | Control measure |
|---|---|---|
0.1mol dm-3 HCl solution |
Contact with eyes |
Flood eye with tap water |
NaOH/Na2CO3 Mixed solution |
Contact with eyes & skin |
Eye: Flood with tap water Skin: Drench with water |
Phenolphthalein indicator |
Flammable, acute toxicity, serious health hazard, corrosive, hazardous to aquatic environment |
Avoid naked flames |
Methyl orange indicator |
Acute toxicity, serious health hazard, corrosive, hazardous to aquatic environment. |
Avoid naked flames |