Chapter 4, Problem 129CP

Interpretation Introduction

Interpretation: The mass of ${\text{SO}}_4^{2-}$ in the sample is to be determined. The mass percentage of ${\text{SO}}_4^{2-}$ in the sample is to be determined. The mass percentage of ${\text{Na}}_{\text{2}}{\text{SO}}_{\text{4}}$ and ${\text{K}}_{\text{2}}{\text{SO}}_{\text{4}}$ in the sample are to be determined.

Concept introduction: A given sample’s chemical composition is derived implying the mass percentages of its respective component species. Parent compound is constituted by certain ions. The ion’s moles acquiring the sample is entirely dependent on moles of their parent compounds.The derivation of mass percentages is achieved by the expression shown below.

  $\text{Mass}\text{percentage}=\frac{\text{Mass}\text{of}\text{component}}{\text{Mass}\text{of}\text{sample}}\times 100\%$