Question

What is the molar concentration of HCl if 50 mL of a 0.25M, KOH solution are needed to neutralize 20 mL of HCl solution.​

Answer 1

Answer:

Volume of KOH= 50 ml.

Concentration of KOH= 0.5 M= 0.5N

Volume of H2SO4= 125 ml

Conc. of H2SO4= ?

So conc.of H2SO4= 50 x 0.5/125. =0.2N.

Since the basicity of H2SO4= 2. Molarity=Normality/2

So Molarity of H2SO4= 0.2/2= 0.1M

Equation of NEUTRALISATION is

2KOH + H2SO4====>K2SO4 +2H2O