Chapter 6, Problem 6H.5AST

(a)

Interpretation Introduction

Interpretation:

A sample contains 25.0 mL volume of $\text{0}\text{.200}\text{M}{\text{H}}_3{\text{PO}}_4{}_{\text{(aq)}}$ was titrated with $\text{0}\text{.100}\text{M}{\text{NaOH}}_{\text{(aq)}}$, the primary species on solution after the addition of 70.0 mL of ${\text{NaOH}}_{\text{(aq)}}$ has to calculated.

Polyprotic acid:

Polyprotic acid is an acid, which can donate minimum two or more than two protons from per molecule to an aqueous solution.  Diprotic and triprotic acids are commonly available polyprotic acids, it can able to donate or loss two and three protons, respectively.  The polyprotic acid shows more than one equivalence points in their titratin curves; it depends on the number of protons they possess.

(b)

Interpretation Introduction

Interpretation:

A sample contains 25.0 mL volume of $\text{0}\text{.200}\text{M}{\text{H}}_3{\text{PO}}_4{}_{\text{(aq)}}$ was titrated with $\text{0}\text{.100}\text{M}{\text{NaOH}}_{\text{(aq)}}$, the primary species on solution after the addition of 100.0 mL of ${\text{NaOH}}_{\text{(aq)}}$ has to calculated.

Concept introduction:

Refer to part (a).