2 MnO_4^{-} + bI^{-} + cH_2O rightarrow xI_2 | vedclass

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

Question

(A) The given redox reaction is: $2 MnO_4^{-} + bI^{-} + cH_2O \rightarrow xI_2 + yMnO_2 + zOH^{-}$Step $1$: Write the half-reactions.Reduction half:

Vedclass · Accepted Answer

$8$

Vedclass · Answer

(A) The given redox reaction is: $2 MnO_4^{-} + bI^{-} + cH_2O \rightarrow xI_2 + yMnO_2 + zOH^{-}$Step $1$: Write the half-reactions.Reduction half: $MnO_4^{-} \rightarrow MnO_2$Balancing $O$ and $H$ in basic medium: $MnO_4^{-} + 2 H_2O + 3 e^{-} \rightarrow MnO_2 + 4 OH^{-}$Multiply by $2$: $2 MnO_4^{-} + 4 H_2O + 6 e^{-} \rightarrow 2 MnO_2 + 8 OH^{-}$Step $2$: Oxidation half.Oxidation half: $I^{-} \rightarrow I_2$Balancing atoms and electrons: $2 I^{-} \rightarrow I_2 + 2 e^{-}$Multiply by $3$: $6 I^{-} \rightarrow 3 I_2 + 6 e^{-}$Step $3$: Add the two half-reactions.$2 MnO_4^{-} + 6 I^{-} + 4 H_2O \rightarrow 2 MnO_2 + 3 I_2 + 8 OH^{-}$Comparing this with the given equation,the coefficient $z$ corresponds to the number of $OH^{-}$ ions,which is $8$.

$2 MnO_4^{-} + bI^{-} + cH_2O \rightarrow xI_2 + yMnO_2 + zOH^{-}$
If the above equation is balanced with integer coefficients,the value of $z$ is . . . . . .

Similar Questions

Assign $A, B, C, D$ from the given type of reaction.
$CuSO_4 + 2KCN \longrightarrow CuCN \downarrow + (CN)_2 \uparrow + K_2SO_4$

Assign $A, B, C, D$ from the given type of reaction.
$Mg_{(s)} + 2H_2O_{(l)} \xrightarrow{\text{Warm}} Mg(OH)_{2(aq)} + H_{2(g)} \uparrow$

Assign $A$,$B$,$C$,$D$ from the given type of reaction.
$(NH_4)_2Cr_2O_7 \xrightarrow{\Delta} N_2 \uparrow + Cr_2O_3 \downarrow + 4H_2O \uparrow$

Assign $A, B, C, D$ from the given type of reaction.
$2NaNO_3 \xrightarrow{\Delta} 2NaNO_2 + O_2$

$Cr _2 O _7^{2-} \rightarrow Cr ^{3+}_{aq}$
How many moles of $Sn^{2+}$ will be oxidized by $1 \ mol \ Cr_2O_7^{2-}$ into $Sn^{4+}$?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$2 MnO_4^{-} + bI^{-} + cH_2O \rightarrow xI_2 + yMnO_2 + zOH^{-}$If the above equation is balanced with integer coefficients,the value of $z$ is . . . . . .

Similar Questions

Assign $A, B, C, D$ from the given type of reaction.$CuSO_4 + 2KCN \longrightarrow CuCN \downarrow + (CN)_2 \uparrow + K_2SO_4$

Assign $A, B, C, D$ from the given type of reaction.$Mg_{(s)} + 2H_2O_{(l)} \xrightarrow{\text{Warm}} Mg(OH)_{2(aq)} + H_{2(g)} \uparrow$

Assign $A$,$B$,$C$,$D$ from the given type of reaction.$(NH_4)_2Cr_2O_7 \xrightarrow{\Delta} N_2 \uparrow + Cr_2O_3 \downarrow + 4H_2O \uparrow$

Assign $A, B, C, D$ from the given type of reaction.$2NaNO_3 \xrightarrow{\Delta} 2NaNO_2 + O_2$

$Cr _2 O _7^{2-} \rightarrow Cr ^{3+}_{aq}$ How many moles of $Sn^{2+}$ will be oxidized by $1 \ mol \ Cr_2O_7^{2-}$ into $Sn^{4+}$?