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

Question

How many kilograms of wet NaOH containing 12% water are required to prepare 60 litres of 0.50 N solution? (A) 1.36 kg (B) 1.50 kg (C) 2.40 g (D) 3.16 kg

Tardigrade Admin · Accepted Answer

One litre of 0.50 N NaOH contains =0.50 × 40 g=20 g =0.020 kg ∴ 60 litres of 0.50 N NaOH contain =0.020 × 60 kg=1.20 kg NaOH Since the given NaOH contains 12% water, the amount of pure NaOH in 100 kg of the given NaOH = 100 -12 = 88kg Thus 88 kg of pure NaOH is present in 100 kg wet NaOH ∴ 1.20 kg of pure NaOH is present in =(100/88)×1.20 =1.36 kg wet NaOH

Q. How many kilograms of wet NaOH containing 12% water are required to prepare 60 litres of 0.50 N solution?

$1.36 k g$

$1.50 k g$

$2.40 g$

$3.16 k g$

Q. How many kilograms of wet NaOH containing 12% water are required to prepare 60 litres of 0.50 N solution?

1.36kg

1.50kg

2.40g

3.16kg

$1.36 k g$

$1.50 k g$

$2.40 g$

$3.16 k g$