Barium Perchlorate VS

Ba(ClO₄)₂ = 336.2

For a 0.05m solution Dissolve 15.8 g of barium hydroxide in a mixture of 7.5 mL of perchloric acid and 75 mL of water, adjust the solution to pH 3 by adding perchloric acid and filter if necessary. Add 150 mL of ethanol (96 per cent) and dilute to 250 mL with water. Dilute to 1000.0 mL with buffer solution pH 3.7.

Standardisation. To 5.0 mL of 0.05 M sulfuric acid add 5 mL of water, 50 mL of buffer solution pH 3.7 and 0.5 mL of alizarin S solution. Titrate with the barium perchlorate solution until an orange-red colour appears. Standardise immediately before use.

Dilution. Use buffer solution pH 3.7.

For a 0.025m solution Dilute 500 mL of 0.05m barium perchlorate VS to 1000 mL with buffer solution pH 3.7.