Question

1.15.7 cm3 of HCl completely neutralised 25 cm3 of LiOH. The HCl was 2 mol/dm3.The equation is :

LiOH + HCl ----->LiCl + H2O. Calculate the concentration of the LiOH.

Answer 1

C₂ = 1.26 mol/dm³

Step-by-step explanation:

Given data:

Volume of HCl =V₁ = 15.7 cm³

Volume of LiOH = V₂ = 25 cm³

Concentration of HCl =C₁ = 2 mol/dm³

Concentration of LiOH =C₂= ?

Solution:

Chemical equation:

LiOH + HCl → LiCl + H₂O

Formula:

C₁V₁ = C₂V₂

by putting values,

15.7 cm₃× 2 mol/dm³ = C₂× 25 cm³

C₂ = 15.7 cm₃× 2 mol/dm³ / 25 cm³

C₂ = 31.4 cm₃.mol/dm³ / 25 cm³

C₂ = 1.26 mol/dm³