Question

An unknown $Mo$ chloride is electrolyzed using $3.0$ amperes for $3.2\times {10}^{4}sec.32.0g$ of solid $Mo$ is produced.
What is the formula of the unknown $Mo$ chloride?

• A. $MoCl$
• B. $MoC{l}_2$
• C. $MoC{l}_3$
• D. $MoC{l}_4$

Answer 1

Answer: (A)

$MoCl$

we have

$w=$$\frac{molecularweight\ast I\ast t}{n\ast 96500}$

$32=\frac{96\ast 3\ast 3.2\ast {10}^4}{96500\ast n}$

we get n= 3

so, formula of unknown Mo chloride becomes $MoC{l}_3$