10 mL of 1.0 M aqueous solution of is added to excess of NaOH in order to…
CHEMISTRY · Subjective · A Level · Chemistry · Oxidation, reduction and redox reactions · Oxidation, reduction and redox reactions
Problem
10 mL of 1.0 M aqueous solution of Br2 is added to excess of NaOH in order to disproportionate quantitatively to Br− and BrO3− . The resulting solution is made free from Br− ion by extraction and excess of OH− neutralized by acidifying the solution. This solution requires 1.5 g of an impure CaC2O4 sample for complete redox change. Calculate % purity of CaC2O4 sample.