Chapter 5, Problem 93IAE

Interpretation Introduction

(a)

Interpretation:

The balanced chemical equations for the 4 chemical reactions according to the given information needs to be determined.

Concept introduction:

A chemical equation is said to be balanced if there are equal number of atoms of same elements present on both sides of the reaction arrow.

Interpretation Introduction

(b)

Interpretation:

The mass of lime in kg needed for the removal of phosphorus from 10⁴ holding tanks containing contaminated water needs to be determined.

Concept introduction:

According to Avogadro’s law, 1 mol of a substance contain $6.023\times {10}^{23}$ units of that substance. The molar mass is mass of 1 mol of a substance, it is related to mass and number of moles as follows:

$n=\frac{m}{M}$

Here, m is mass and M is molar mass.

The density of a substance is defined as mass per unit volume. It is mathematically represented as follows:

$d=\frac{m}{V}$

Here, m is mass and V is volume of the substance.