The coefficient w- x- y- z in the reaction wCr2O2-7-xFe2- yCr3-zFe3-H2O is-

The correct option is B 1, 6, 2, 6 #160; #160; #160; #160; #160; #160; #160; #160; Cr_2O_7^ 2+Fe^+2→Cr^+3+Fe^+3+H_2O #160; ...

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Byju's Answer

Standard XII

Chemistry

Stoichiometry

The coefficie...

Question

The coefficient $w, x, y, z$ in the reaction $w C r_{2} O_{7}^{2 -} + x F e^{2 +} ⟶ y C r^{3 +} + z F e^{3 +} + H_{2} O$ is:

1, 2, 6, 6

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6, 1, 2, 4

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1, 6, 2, 6

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1, 2, 4, 6

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Solution

The correct option is B $1, 6, 2, 6$
${C r}_{2} O_{7}^{- 2} + {F e}^{+ 2} \to {C r}^{+ 3} + {F e}^{+ 3} + H_{2} O$
Oxidation 6 2 3 3
state
Step $1$
Ox. half reaction ${F e}^{+ 2} \to {F e}^{+ 3}$
Reduction half reaction ${C r}_{2} O_{7}^{- 2} \to {C r}^{+ 3}$
Step $2$
Balancing all atoms except O & H
Ox. half reaction ${F e}^{+ 2} \to {F e}^{+ 3}$
Reduction half reaction ${C r}_{2} O_{7}^{- 2} \to 2 {C r}^{+ 3}$
Step $3$
Balancing O by adding $H_{2} O$
Ox. half reaction ${F e}^{+ 2} \to {F e}^{+ 3}$
Reduction half reaction ${C r}_{2} O_{7}^{- 2} \to 2 {C r}^{+ 3} + 7 H_{2} O$
Step $5$
Balancing H by adding $H^{+ 1}$ ions
Ox. half reaction ${F e}^{+ 2} \to {F e}^{+ 3}$
Reduction half reaction ${C r}_{2} O_{7}^{- 2} + 14 H^{+ 1} \to 2 {C r}^{+ 3} + 7 H_{2} O$
Step $6$
Balancing the chrages
Ox. half reaction ${F e}^{+ 2} \to {F e}^{+ 3} + e^{- 1}$
Reduction half reaction ${C r}_{2} O_{7}^{- 2} + 14 H^{+ 1} + 6 e^{- 1} \to 2 {C r}^{+ 3} + 7 H_{2} O$
Step $7$
Make number of electrons electrons
multiply oxidation reaction by 6
Ox. half reaction $6 {F e}^{+ 2} \to 6 {F e}^{+ 3} + 6 e^{- 1}$
Reduction half reaction ${C r}_{2} O_{7}^{- 2} + 14 H^{+ 1} + 6 e^{- 1} \to 2 {C r}^{+ 3} + 7 H_{2} O$
Step $8$
Adding both the half reactions
$6 {F e}^{+ 2} + {C r}_{2} O_{7}^{- 2} + 14 H^{+} \to 6 {F e}^{+ 3} + 2 {C r}^{+ 3} + 7 H_{2} O$
SO w $= 1$
x $= 6$
y $= 2$
z $= 6$

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Similar questions

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H_{2} (g) + V_{2} O_{5} (s) \to V_{2} O_{3} (s) + H_{2} O (l)

Let the coefficients for the given reaction be as follows:

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The coefficient w,x,y,z in the reaction wCr2O2−7+xFe2+⟶yCr3++zFe3++H2O is:

The coefficient $w, x, y, z$ in the reaction $w C r_{2} O_{7}^{2 -} + x F e^{2 +} ⟶ y C r^{3 +} + z F e^{3 +} + H_{2} O$ is: