Question

Find out % of oxalate ion ina given sample of an alkali metal oxalate salt, 0.30g of it is dissolve in 100mL water and its required 90mL OF Centimolar `KMnO_(4)` solution in aicdic medium:
A. `66%`
B. `55%`
C. `44%`
D. `6.6%`

Answer 1

Correct Answer - A
`1000 xx (W)/(24 +64) xx 2 = 90 xx (1)/(100) xx 5`,
`W = 0.198g`
% of oxalate ion in a given sample
`= (0.198)/(0.3) xx 100 = 66`