If stoichiometric quantities of a KMnO_4 and | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) In an acidic medium,both $KMnO_4$ and $K_2Cr_2O_7$ act as oxidizing agents to convert $Fe^{2+}$ to $Fe^{3+}$.$MnO_4^- + 8H^+ + 5e^- \rightarrow Mn

Vedclass · Accepted Answer

more by $KMnO_4$

Vedclass · Answer

(B) In an acidic medium,both $KMnO_4$ and $K_2Cr_2O_7$ act as oxidizing agents to convert $Fe^{2+}$ to $Fe^{3+}$.$MnO_4^- + 8H^+ + 5e^- \rightarrow Mn^{2+} + 4H_2O$ (n-factor = $5$)$Cr_2O_7^{2-} + 14H^+ + 6e^- \rightarrow 2Cr^{3+} + 7H_2O$ (n-factor = $6$)Since the question specifies that stoichiometric quantities are added,the amount of $Fe^{2+}$ oxidized depends on the number of moles of electrons provided by each oxidant.However,$KMnO_4$ is a stronger oxidizing agent than $K_2Cr_2O_7$ due to its higher reduction potential in acidic medium ($E^\circ_{MnO_4^-/Mn^{2+}} = 1.51 \ V$ vs $E^\circ_{Cr_2O_7^{2-}/Cr^{3+}} = 1.33 \ V$).Therefore,$KMnO_4$ is more effective at oxidizing $Fe^{2+}$.

List-$I$	List-$II$
$P. \ PbO_2 + H_2SO_4 \xrightarrow{?} PbSO_4 + O_2 + \text{other product}$	$1. \ NO$
$Q. \ Na_2S_2O_3 + H_2O \xrightarrow{?} NaHSO_4 + \text{other product}$	$2. \ I_2$
$R. \ N_2H_4 \xrightarrow{?} N_2 + \text{other product}$	$3. \ \text{Warm}$
$S. \ XeF_2 \xrightarrow{?} Xe + \text{other product}$	$4. \ Cl_2$

If stoichiometric quantities of a $KMnO_4$ and $K_2Cr_2O_7$ mixture are added for the oxidation of $Fe^{2+}$ to $Fe^{3+}$ in an acidic medium,then $Fe^{2+}$ will be oxidized:

Similar Questions

Which of the following reactions is not a redox reaction?

Which of the following reactions is $NOT$ an example of a redox reaction?

Which of the following are redox changes?
$(i)$ Hydrolysis of $XeF_2$
$(ii)$ Thermal decomposition of $Ag_2CO_3$
$(iii)$ Reaction of $Al$ with $NaOH$
$(iv)$ Hydrolysis of $PCl_5$
$(v)$ Reaction of $NaCl$ with conc. $H_2SO_4$
Correct options are:

Which of the following reactions is $NOT$ an intermolecular redox reaction?

Vedclass Test Series

Exam Paper Generator

Online Exam Module