Chapter 3, Problem 3J.14E

Interpretation Introduction

Interpretation:

Molar concentration of quantum dots of $\text{PbS}$ formed by $\text{Pb}{\left({\text{NO}}_3\right)}_2$ and ${\left({\text{NH}}_4\right)}_2\text{S}$ has to be calculated.

Concept Introduction:

The smallest semiconductor particles are in range of nanometers in size with electronic and optical properties that differ from large particles are called quantum dots. These are helpful in nanotechnology and helps in the examination of tiny particles.

The formula used to calculate number of moles is as follows:

  $n=MV$        (1)

Here,

$n$ is number of moles.

$M$ is molarity.

$V$ is volume in litres.