A student carries out a titration to determine the volume of hydrochloric acid needed to neutralise a solution of barium hydroxide.
She starts with 20.0 cm320.0\text{ cm}^320.0 cm3 of barium hydroxide solution of concentration 0.150 mol/dm30.150\text{ mol/dm}^30.150 mol/dm3.
She adds 0.250 mol/dm30.250\text{ mol/dm}^30.250 mol/dm3 hydrochloric acid until the barium hydroxide is completely neutralised.
The equation for this reaction is:
Ba(OH)2+2HCl→BaCl2+2H2O \text{Ba(OH)}_2 + 2\text{HCl} \rightarrow \text{BaCl}_2 + 2\text{H}_2\text{O} Ba(OH)2+2HCl→BaCl2+2H2OCalculate the amount, in moles, of barium hydroxide used.
Calculate the amount, in moles, of hydrochloric acid needed to neutralise this amount of barium hydroxide.
Calculate the volume, in cm3\text{cm}^3cm3, of hydrochloric acid needed to neutralise this status of barium hydroxide.