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Question : 19
Total: 35
SECTION - B
(a) (i) What should be the signs (positive/ negative) for (ii) State Faraday's first law of electrolysis.
OR
(b) Calculate the emf of the following cell at
Given
Solution: 👈: Video Solution
(a) (i)
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(ii) Faraday first law of electrolysis - The amount of chemical reaction which occur at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte (solution).
OR
(b) According to the equation
F e ( s ) + 2 H + ( a q ) → F e + 2 ( a q ) + H 2 ( g )
By applying nearest Equation -
E cell = E ° cell −
log
= 0.44 −
log
= 0.44 − 0.0295 log 10 − 3
= 0.44 − 0.0295 ( − 3 log 10 ) ( log 10 = 1 )
= 0.44 + 0.089
E cell = 0.53 V
(ii) Faraday first law of electrolysis - The amount of chemical reaction which occur at any electrode during electrolysis by a current is proportional to the quantity of electricity passed through the electrolyte (solution).
OR
(b) According to the equation
By applying nearest Equation -
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