How many kilograms of wet `NaOH` containing `12%` water are required to prepare 60 litre of 0.50 N solution ?

Options

A. `1.36 Kg`
B. `1.50 Kg`
C. `2.40 Kg`
D. 4.16

Answer

A

Explanation

One litre if `0.50` N NaOH contains
`=0.50xx40g =20g =0.020kg`
`:. 60` litre of `0.50` NaOH contain
`=0.020xx60 kg=1.20kg` NaOH
since the given NaOH contain`12 %` water the amount of pure NAOH in `100 kg`of the given NaOH =`100-12=88 kg`
Thus `88kg` of pure NaOH is present in `100kg` wet NaOH
`:. 1.20 Kg` of pure NaOH is present in
`(100)/(88)xx1.20=1.36` kg of wet NaOH