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  • Please help! When an electric current is passed throughacidified water, 112 mL of hydrogen gasat N.T.P. was collected at the cathode in965 seconds. The current assed, inampere, is :

When an electric current is passed through acidified water, 112 mL of hydrogen gas at N.T.P. was collected at the cathode in 965 seconds. The current assed, inampere , is :

  • Option 1)

    1.0

  • Option 2)

    0.5

  • Option 3)

    0.1

  • Option 4)

    2.0

 

Answers (1)

best_answer

As we learned

 

Faraday's first law of electrolysis -

The mass of any substance deposited or dissolved at any electrode during electrolysis is directly propotional to the quantity of electricity passed through the solution.

- wherein

W\alpha\ Q

W = Z I t

Z = mass of electrolyte get deposited

Z = electro chemical equivalent

 

2H_{2}O +2e^{-} \rightarrow H_{2} + 2OH^{-} ; (v.f)_{H_{2}} = 2

mole = \frac{i\times t}{v.f\times 96500}

\frac{112}{22400}= \frac{i\times 965}{2\times 96500}

\frac{1}{2} = \frac{j}{2}

j = 1 qupere  


Option 1)

1.0

Option 2)

0.5

Option 3)

0.1

Option 4)

2.0

Posted by

prateek

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