MCQ
Manganese ions $(Mn^{2+})$ can be oxidised by Persulphate ions $S_2O_8^{2-}$ according to the following half-equations,
$S_2O_8^{2-} + 2e^- \longrightarrow 2SO_4^{2-}$
$Mn^{2+} + 4H_2O \longrightarrow MnO_4 + 8H^+ + 5e^-$
How many moles of $S_2O_8^{2-}$ are required to oxidise $1\, mole$ of $Mn^{ 2+}$ ?
- ✓$2.5$
- B$2.0$
- C$11.0$
- D$0.4$
