Chapter 6, Problem 110IAE

Interpretation Introduction

Interpretation:

The mass percentage of Fe in the mixtureshould be calculated.

Concept introduction:

Both Aluminum and iron are metals which react with acid solution to form metal chloride and release hydrogen gas.

The balance chemical equation for both metals is given below:

${\text{2Al}}_{\left(\text{s}\right)}{\text{ +6HCl}}_{\text{(aq)}}\to {\text{2AlCl}}_{\text{3}}{}_{\left(\text{aq}\right)}{\text{ +3H}}_{\text{2(g)}}$

${\text{2Fe}}_{\text{(s)}}{\text{+ 6 HCl}}_{\text{(aq)}}\to 2{\text{ FeCl}}_{\text{3(aq)}}{\text{+ 3H}}_{\text{2(g)}}$

Total moles of gases can be used to calculate the pressure with the help of ideal gas equation.

$\text{PV = nRT}$

The total pressure is the sum of vapor pressure and gas pressure.