Chapter 14.2, Problem 33SSC

Interpretation Introduction

Interpretation:

The percent by mass of sodium chloride (NaCl) in a broth is to be calculated where 450 mg of NaClin 240 g of broth.

Concept introduction:

The concentrations of solutions are expressed in different ways, all of them involved in the quantity of solute and the quantity of solution or solvent. Among them, Mass percentage (w/W percent) is used to express the concentration of solution.

Mass percentage (w/W percent):

It is expressed as the ratio of the mass of the solute to the mass of the solution multiplied by 100. (Mass of the solution = mass of the solute + mass of the solvent)

In expression, $\mathrm{Mass}percentage\left(w/W\right)\%= \frac{Massofsolute}{Massofsolution}\times 100$

Answer to Problem 33SSC

Answer. The percent by mass of sodium chloride (NaCl) is 0.19 %.in a broth where 450 mg of NaClin 240 g of broth.

Explanation:

$\mathrm{Mass}percentage\left(w/W\right)\%= \frac{Massofsolute}{Massofsolution}\times 100$

Data given: Mass of solution = 240 g

Mass of the solute = 450 mg=0.45 g

$\mathrm{Percent}bymassofNaCl=\frac{0.45}{240}\times 100$

$\mathrm{Percent}bymassofNaCl=\frac{MassofNaCl}{MassofSolution}\times 100$

$\mathrm{Percent}bymassofNaCl=\frac{0.45}{240}\times 100$

= 0.19 %.

Thus, The percent by mass of sodium chloride (NaCl) is 0.19 %.in a broth where 450 mg of NaClin 240 g of broth.

Explanation of Solution

$\mathrm{Mass}percentage\left(w/W\right)\%= \frac{Massofsolute}{Massofsolution}\times 100$

Data given: Mass of solution = 240 g

Mass of the solute = 450 mg=0.45 g

$\mathrm{Percent}bymassofNaCl=\frac{0.45}{240}\times 100$

$\mathrm{Percent}bymassofNaCl=\frac{MassofNaCl}{MassofSolution}\times 100$

$\mathrm{Percent}bymassofNaCl=\frac{0.45}{240}\times 100$

= 0.19 %.

Thus, The percent by mass of sodium chloride (NaCl) is 0.19 %.in a broth where 450 mg of NaClin 240 g of broth.