Chapter F, Problem L.18E

(a)

Interpretation Introduction

Interpretation:

Concentration of ${\text{H}}_{\text{3}}{\text{PO}}_{\text{4}}$ in solution has to be calculated.

Concept Introduction:

Acid and base reacts to form salt and water.  The concentration of the titrant and volume of the titrant that is required to neutralize the analyte is calculated by volumetric analysis.  Stoichiometric point is the one where the quantity of titrant neutralizes the quantity of analyte that is taken.

In order to determine the molarity of analyte, the stoichiometric relationship between titrant and analyte along with molarity of the titrant that is used is considered.

(b)

Interpretation Introduction

Interpretation:

Mass of ${\text{H}}_{\text{3}}{\text{PO}}_{\text{4}}$ in the initial sample has to be calculated.