Use Na = 23, C = 12, O = 16. In acidic medium KMnO4 oxidises oxalate to CO2 (MnO4- reduced to Mn^2+). Find the volume (in mL, nearest integer) of 0.04 M KMnO4 needed for 1.34 g of Na2C2O4.

JEE Main levelNumerical answerDifficulty 2 of 3rx133

Use Na = 23, C = 12, O = 16. In acidic medium $KMnO X_{4}$ oxidises oxalate to $CO X_{2}$ ( $MnO X_{4} X^{-}$ reduced to $Mn X^{2 +}$ ). Find the volume (in mL, nearest integer) of $0.04 M$ $KMnO X_{4}$ needed for $1.34 g$ of $Na X_{2} C X_{2} O X_{4}$ .

Numerical answer type, answer in mL, tolerance 0.5.

M (Na X_{2} C X_{2} O X_{4}) = 134

, so moles

= 0.01

, equivalents

= 0.01 \times 2 = 0.02

N (KMnO X_{4}) = 0.04 \times 5 = 0.2

V = 0.02/0.2 = 0.1 L = 100 mL