Question

1. How many litres of ammonia gas at S.T.P. would
be needed to prepare 100 ml of 2.5 M ammonium
hydroxide solution?​

Answer 1

Answer:

5.6 litres

Explanation:

According to the formula,

M = Moles of solute × 1000 / Volume (ml) of solution

Let miles of solute be x.

$= > 2.5 = \frac{1000x}{100} \\ = > 2.5 = 10x \\ = > x = \frac{2.5}{10} = 0.25$

Therefore, number of Moles is 0.25.

According to the formula,

Moles = Given volume (litres) / 22.4

Let given volume be y.

$= > 0.25 = \frac{y}{22.4} \\ = > y = 0.25 \times 22.4 = 5.6 \: l$

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