Chapter 17, Problem 17.10P

Interpretation Introduction

Interpretation:

Concentration of ${\text{H}}_{\text{2}}\text{S}$ $\left(\text{μg}/\text{mL}\right)$ in the sample is to be calculated.

Concept Introduction:

Coulometric titration in analytical chemistry is a method in that titrating agent is produced in a solution by electrolysis. Amount of that substance is determined by measuring the quantity of electricity used to electrolyze that substance. For coulometric titration, no standard solution is needed.

Moles of electron flow in a coulometric titration are calculated by the equation as follows:

    $\text{Moles}\text{of}\text{electron}\text{flow}=\frac{\left(\text{Electric}\text{current}\text{in}\text{amperes}\right)\left(\text{time}\text{in}\text{second}\right)}{\text{Faraday}\text{constant}}$