Division 4.1 Fehling's solution:

Solution A:

Dissolve 69·3 g of copper II sulphate pentahydrate (CuSO₄.5H_2O) in water and make up to 1 000 ml.

Solution B:

Dissolve 346·0 g of double sodium potassium tartrate tetrahydrate (KNaC₄H₄O₆.4H₂O) with 100·0 g of sodium hydroxide in water and make up to 1 000 ml. The clear solution should be decanted from a sediment that may form from time to time.

Note:

These two solutions should be stored in brown or amber bottles.