Question

0.0500 mol fe2+ react 0.0100 mol mno4 - react how many moles of fe2+ react for each mole of mno4 -?

Explanation:

Step1: Write the balanced redox - reaction

The reaction between $\text{MnO}_4^-$ and $\text{Fe}^{2 + }$ in acidic medium is $\text{MnO}_4^-(aq)+5\text{Fe}^{2 + }(aq)+8\text{H}^+(aq)
ightarrow\text{Mn}^{2 + }(aq)+5\text{Fe}^{3 + }(aq)+4\text{H}_2\text{O}(l)$.

Step2: Determine the mole - ratio

From the balanced chemical equation, the mole - ratio of $\text{Fe}^{2 + }$ to $\text{MnO}_4^-$ is $n_{\text{Fe}^{2+}}:n_{\text{MnO}_4^-}=5:1$.

Answer:

5