Question

An electrolysis of a oxytungsten complex ion using $1.10A$ for $40$ min produces $0.838g$ of tungsten. What is the charge of tungsten in the material? (Atomic weight: $W=184$)

• A. $6$
• B. $3$
• C. $5$
• D. $1$

Answer 1

Answer: (A)

$6$

Ans :A

w = $\frac{(mol.wt)it}{nF}$

n =$\frac{184\ast 1.10\ast 40\ast 60}{0.838\ast 96500}$

n = 6

o.s. of w = +6