Liquid Volume-Volume Calculations

Topic Content:

In this type of calculation, one volume is given while another volume is to be found.

Example 6.7.1:

25.0 cm³ of a solution of potassium hydroxide is neutralized by 35.0 cm³ of hydrogen chloride of concentration 0.75 mol/dm³ . Calculate the concentration in mol/dm³ of potassium hydroxide solution.

Solution

Equation of reaction:

\( \scriptsize \underset{1\: mole}{KOH} \: + \: \underset{1\: mole}{HCl} \: \rightarrow \: KCl \: + \: H_2O \)

\( \frac {C_a\: V_a}{C_b\: V_b} = \frac{n_a}{n_b} \)

C_a = 0.75 mol/dm³

C_b = ?