In this question give all answers to 3 significant figures. The reaction

In this question give all answers to 3 significant figures. The reaction between NaOH and HCl can be written as:

HCl + NaOH → NaCl + H2O

In such a reaction, 15.0 cm3 of hydrochloric acid was neutralised by 20.0 cmof 0.0500 mol dm–3 sodium hydroxide.

a. What was the volume in dm3 of:

i. The acid?

ii. The alkali?

b. Calculate the number of moles of alkali.

c. Calculate the number of moles of acid and then its concentration.