The relative decreases in the vapour pressure of an aqueous solution containing `2 mol [Cu(NH_(3)_(3)Cl]` in `3 mol H_(2)O` is `0.50`. On reaction with `AgNO_(3)`, this solution will form

Options

A. `1` mol `AgCl`
B. `0.25` mol `AgCl`
C. `0.5` mol `AgCl`
D. `0.40` mol `AgCl`

Answer

C

Explanation

`(DeltaP)/(P)=(ni)/(ni+N)`
`0.5=(2i)/(2i+3)`
`i+1.2=2i`
`i=1.5`
`i=1+(y-1)alpha`
`1.5=1+(2-1)alpha`
`alpha=0.5`
mole of `Cl^(-)=1.0`
mole of `AgCl ppt.=1.0`