Q25 / 160 · AP EAMCET 2005 · Chemistry

What is the quantity of electricity (in Coulombs) required to deposit all the silver from $250 \mathrm{~mL}$ of $1 \mathrm{M} \mathrm{AgNO}_3$ solution?

  • A
    2412.5
  • Correct answer
    B
    24125
  • C
    4825.0
  • D
    48250

Solution

$\begin{array}{r} 250 \mathrm{~mL} 1 \mathrm{M} \mathrm{AgNO}_3 \text { contain }=\frac{250}{1000} \\ =0.25 \mathrm{~mole}_{\mathrm{AgNO}_3} \end{array}$ $\because \quad$ Electricity required to liberate $1 \mathrm{~g}$ equivalent of metal $=96500$ Coulomb $\therefore$ Electricity required to liberate $0.25 \mathrm{~g}$ equivalent of metal $=\frac{96500 \times 0.25}{1}=24125 \text { Coulomb }$

Hence, the correct answer is option: 'B'.

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