Chapter 17, Problem 17.18P

Interpretation Introduction

Interpretation:

The concentration of hydrogen sulfide during the titration with potassium iodide has to be determined.

Concept introduction:

At any point in an electric circuit the charge q is the product of current I and time t.

$\text{q}\text{=}\text{I}·\text{t}$

The number of moles of electrons n reacts in a reaction with given time t is

$\text{Reacted}\text{moles}\text{=}\frac{\text{I}\text{.}\text{t}}{\text{nF}}$

Molarity can be defined as the moles of solute (in grams) to the volume of the solution (in litres). The molarity of a solution can be given by the formula,

$\text{Molarity(M)=}\frac{\text{Moles}\text{of}\text{solute(in}\text{g)}}{\text{Volume}\text{of}\text{solution(in}\text{L)}}$