See the following chemical reaction: Cr 2 O 7 2 - + XH + + 6 Fe 2 + YCr 3 + + 6 Fe 3 + + ZH 2 O The sum of X, Y and Z is _______ . [2023]

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Solution

Q.
See the following chemical reaction:

${Cr}_{2} O_{7}^{2 -} + {XH}^{+} + 6 {Fe}^{2 +} \to {YCr}^{3 +} + 6 {Fe}^{3 +} + {ZH}_{2} O$

The sum of X, Y and Z is _______ . [2023]

Ans.
(23)

Balance reaction is:

${Cr}_{2} O_{7}^{2 -} + 14 H^{+} + 6 {Fe}^{+ 2} \to 6 {Fe}^{+ 3} + 2 {Cr}^{+ 3} + 7 H_{2} O$

$X = 14$ $Y = 2$ $Z = 7$

$Hence (X + Y + Z) = 14 + 2 + 7 = 23$

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