Division 4.16 Fehling's solution

Solution A

Weigh 7 g of copper sulphate pentahydrate (4.5) into a 100 ml standard flask.

Dissolve in a little water. Make up to the mark with water and mix.

Solution B

Weigh 35 g of potassium sodium tartrate (4.6) into a 100 ml standard flask. Dissolve in 50 ml of water. Add 20 ml of sodium hydroxide (4.4). Make up to the mark with water and mix. Immediately before use, pipette 10 ml of solution A and 10 ml of solution B into a 100 ml standard flask. Make up to the mark and mix.