Tollen-s reagent is used for the detection of aldehyde when a solution of AgNO3 is added to glucose with NH4OH then fluconic acid is formced Ag-e- Ag- Eredo-0-8V C6H12O6-H2O-C6H12O7 Gluconic acid -2H-2e- Eredo-0-05V AgNH32-e- Ags-2NH3-Use 2-202-RTF-0-0592 and FRT-38-92at 298K 2Ag-C6H22O6-H2O- 2Ags-C6H212O7-2H-Find lnK of this reaction-

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Tollen's reag...

Question

Tollen's reagent is used for the detection of aldehyde when a solution of $A g {N O}_{3}$ is added to glucose with ${N H}_{4} O H$ then fluconic acid is formced
${A g}^{+} + e^{-} \to A g$ ;
$E_{r e d}^{o} = 0.8 V$
$C_{6} H_{12} O_{6} + H_{2} O \to C_{6} H_{12} O_{7}$ (Gluconic acid) $+ 2 H^{+} + 2 e^{-}$ ; $E_{r e d}^{o} = - 0.05 V$
$A g {({N H}_{3})}_{2} + e^{-} \to A g (s) + 2 {N H}_{3}$ ;
(Use $2.202 \times \frac{R T}{F} = 0.0592$ and $\frac{F}{R T} = 38.92$ at $298 K$ )
$2 {A g}^{+} + C_{6} H_{22} O_{6} + H_{2} O \to 2 A g (s) + C_{6} H_{212} O_{7} + 2 H^{+}$
Find $ln K$ of this reaction?

66.13

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58.38

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28.30

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46.29

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Solution

The correct option is B $58.38$
Here the answer is wrong, and the correct answer is option(B).

Solution:

$E_{c e l l}^{0} = \frac{R T}{n f} l n K$

$(0.8 - 0.05) = \frac{1}{2} X \frac{0.0592}{2.303} l n K$

$l n K = \frac{(0.8 - 0.05) X 2 X 2.303}{0.0592} = 58.38$

Hence,58.38 is the correct answer.

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Similar questions

Tollen’s reagent is used for the detection of aldehyde, when a solution of $A g N O_{3}$ is added to glucose with $N H_{4} O H$ then gluconic acid is formed.

$A g^{+} + e^{-} \to A g;$ $E_{r e d}^{\circ} = 0.8 V$

$C_{6} H_{12} O_{6} + H_{2} O \to C_{6} H_{12} O_{7}$ (Gluconic acid) $+ 2 H^{+} + 2 e; E_{o x d}^{\circ} = - 0.05 V$

$A g (N H_{3})_{2}^{+} + e^{-} \to A g (S) + 2 N H_{3}; E^{\circ} = - 0.337 V$

[Use $2.303 \times \frac{R T}{F} = 0.0592$ and $\frac{F}{R T} = 38.92$ at 298 K]

(i) $2 A g^{+} + C_{6} H_{12} O_{6} + H_{2} O \to 2 A g (s) + C_{6} H_{12} O_{7} + 2 H^{+}$ . Find ln K of this reaction.

Q. Tollen's reagent is used for the detection of aldehydes. When a solution of

A g N O_{3}

is added to glucose with

N H_{4} O H

, then gluconic acid is formed.

A g^{+} + e^{-} \to A g; E_{r e d}^{o} = 0.80 V

C_{6} H_{12} O_{6} + H_{2} O \to C_{6} H_{12} O_{7} + 2 H^{+} + 2 e^{-}; E_{o x i}^{o} = - 0.05 V

A g (N H_{3})_{2}^{+} + e^{-} \to A g (s) + 2 N H_{3}; E_{r e d}^{o} = 0.337 V

Find

log K

of the reaction?

2 A g^{+} + C_{6} H_{12} O_{6} + H_{2} O \to 2 A g (s) + C_{6} H_{12} O_{7} + 2 H^{+}

(Take : 2.303 \times \frac{R T}{F} = 0.06 at 298 K)

Q. Tollen's reagent is used for the detection of aldehydes. When a solution of

A g N O_{3}

is added to glucose with

N H_{4} O H

, then gluconic acid is formed.

A g^{+} + e^{-} \to A g; E_{r e d}^{o} = 0.80 V

C_{6} H_{12} O_{6} + H_{2} O \to C_{6} H_{12} O_{7} + 2 H^{+} + 2 e^{-}; E_{o x i}^{o} = - 0.05 V

A g (N H_{3})_{2}^{+} + e^{-} \to A g (s) + 2 N H_{3}; E_{r e d}^{o} = 0.337 V

Find

log K

of the reaction?

2 A g^{+} + C_{6} H_{12} O_{6} + H_{2} O \to 2 A g (s) + C_{6} H_{12} O_{7} + 2 H^{+}

(Take : 2.303 \times \frac{R T}{F} = 0.06 at 298 K)

Tollen’s reagent is used for the detection of aldehyde, when a solution of $A g N O_{3}$ is added to glucose with $N H_{4} O H$ then gluconic acid is formed.

$A g^{+} + e^{-} \to A g;$ $E_{r e d}^{\circ} = 0.8 V$

$C_{6} H_{12} O_{6} + H_{2} O \to C_{6} H_{12} O_{7}$ (Gluconic acid) $+ 2 H^{+} + 2 e; E_{o x d}^{\circ} = - 0.05 V$

$[A g (N H_{3})_{2}]^{+} + e^{-} \to A g (S) + 2 N H_{3}; E_{r e d}^{\circ} = - 0.337 V$