Calculate the volumeof 1.0M NaOH necessary to completely neutralize 100mL of 0.50M of phosphoric acid (H3PO4) ?

50 mL

Explanation:

In case of titration, the following formula is used -

M₁V₁ = M₂V₂

where,

M₁ = concentration of acid,

V₁ = volume of acid,

M₂ = concentration of base,

V₂ = volume of base.

from, the question,

M₁ = 0.50M

V₁ = 100 mL

M₂ = 1.0M

V₂ = ?

Using the above formula, the volume of base, can be calculated as,

M₁V₁ = M₂V₂

substituting the respective values,

0.50M * 100 mL = 1.0M * V₂

V₂ = 50 mL