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  • I need help with The negative Zn pole of a Daniell cell, sending a constant current through a circuit, decreases in mass by 0.13 g in 30 minutes. If the electrochemical equivalent of Zn and Cu are 32.5 and 31.5 respectively, the increase in the mass

The negative Zn pole of a Daniell cell, sending a constant current through a circuit, decreases in mass by 0.13 g in 30 minutes. If the electrochemical equivalent of Zn and Cu are 32.5 and 31.5 respectively, the increase in the mass of the positive Cu pole in this time is

  • Option 1)

    0.180 g

  • Option 2)

    0.141 g

  • Option 3)

    0.126 g

  • Option 4)

    0.242 g

 

Answers (1)

best_answer

\frac{m_{Zn}}{m_{Cu}}= \frac{Z_{Zn}}{Z_{Cu}}    Where i  and t are  same 

\frac{0.13}{m_{Cu}}= \frac{32.5}{31.5}

{m_{Cu}}= 0.126 g


Option 1)

0.180 g

Option 2)

0.141 g

Option 3)

0.126 g

Option 4)

0.242 g

Posted by

Avinash

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