28cm3 of 0.2mol of sodium hydroxide was titrated against 25cm3 of hydrochloric acid using methyl orange as indicator, calculate the concentration in mol/dm3,calculate the concentration in g/dm3

Answer 1

NaOH + HCl ==> NaCl + H2O
mols NaOH = ?
Look at the reaction equation. 1 mol NaOH = 1 mol HCl; therefore, mols HCl = mols NaOH.
Then mol/dm3 HCl = mols HCl/dm3 = ?