Paragraph 4 REAGENTS
Diluted hydrochloric acid solution, about 0.5 M
4.1
Mix 1 volume of hydrochloric acid (r = 1.18 g/ml) with 20 volumes of water.
Hydrogen peroxide solution (30% H2O2, ρ = 1.11 g/ml), free from trace elements
4.2
Diluted hydrochloric acid solution, about 0.5 M
Mix 1 volume of hydrochloric acid (r = 1.18 g/ml) with 20 volumes of water.
Hydrogen peroxide solution (30% H2O2, ρ = 1.11 g/ml), free from trace elements