First, write a balanced equation and ensure the stoichiometry is in order:
HCl + NaOH → NaCl + H2O
Following the reaction above, the mole ratio is 1 : 1
Given:
Concentration of Acid, CA = 0.12moldm−3, Volume of Acid, VA = ?
Concentration of Base, CB = 0.20 moldm−3 Volume of Base, VB = 20cm3
Using the relation, CAVA = CBVB
VA = CBVBCA
= 0.20×200.12
= 33.33cm3
