Question

On electrolysis of an oxytungsten complex ion using $1.0\text{A}$ for $48.25\text{min}$ produces $0.92\text{g}$ of tungsten. What is the charge on tungsten in material? (Atomic weight $W=184\text{u}$)

Answer 1

Using Faraday's law
$\frac{W}{M}\times n=\frac{I\times t}{F}$
where,
$W=\text{Given weight of metal}M=\text{Molar mass}n=\text{number of electrons transferred}I=\text{Current in Amperes}t=\text{time in seconds}F=96500$
Substituting values, we get
$\frac{0.92}{184}\times n=\frac{48.25\times 60\times 1.0}{96500}$
$\Rightarrow n=6$