In acidic medium,the equivalent weight of K_2 | vedclass

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

Question

(C) The reduction half-reaction for $K_2Cr_2O_7$ in an acidic medium is:$Cr_2O_7^{2-} + 14H^{+} + 6e^{-} 	o 2Cr^{3+} + 7H_2O$In this reaction,the cha

Vedclass · Accepted Answer

$M/6$

Vedclass · Answer

(C) The reduction half-reaction for $K_2Cr_2O_7$ in an acidic medium is:$Cr_2O_7^{2-} + 14H^{+} + 6e^{-} 	o 2Cr^{3+} + 7H_2O$In this reaction,the change in oxidation state of $Cr$ is from $+6$ to $+3$. Since there are two $Cr$ atoms,the total change in oxidation number is $2 	imes (6 - 3) = 6$.Thus,the $n$-factor for $K_2Cr_2O_7$ is $6$.The equivalent weight is calculated as:$	ext{Equivalent weight} = \frac{	ext{Molecular weight}}{n	ext{-factor}} = \frac{M}{6}$.

In acidic medium,the equivalent weight of $K_2Cr_2O_7$ $(mol. wt. = M)$ is

Similar Questions

Justify that the reaction:
$2 Cu_{2}O_{(s)} + Cu_{2}S_{(s)} \rightarrow 6 Cu_{(s)} + SO_{2(g)}$
is a redox reaction. Identify the species oxidised/reduced,which acts as an oxidant and which acts as a reductant.

$PbS + 4O_3 \,\to ?\,+\,4O_2$

Assign $A, B, C, D$ from the given type of reaction for the following chemical equation:
$Mg_{(s)} + 2HCl_{(aq)} \longrightarrow MgCl_{2(aq)} + H_{2(g)}$

The reaction of bromine water with $SO_2$ produces .......

Explain the balancing of a redox reaction by the oxidation number method.

Vedclass Test Series

Exam Paper Generator

Online Exam Module