Chapter 21, Problem 115IL

(a)

Interpretation Introduction

Interpretation:

To write the balanced chemical equation for the reaction of ${\text{CH}}_{\text{3}}\text{Cl}\left(\text{g}\right)$ and silicon

Concept introduction:

A chemical equation consists of reactants and products. The two are separated by an arrow. Each substances of reactants and products are separated from other by a plus sign. The reactants lies on left hand side while products lies on right hand side of the reaction.

A balanced chemical equation occurs when the number of atoms in reactant side is equal to the number of atoms in the product side.

(b)

Interpretation Introduction

Interpretation:

The pressure of ${\text{CH}}_{\text{3}}\text{Cl}\left(\text{g}\right)$ in the flask has to be  calculated.

Concept introduction:

Silicons are prepared by using dichloromethylsilane. The formula for  dichloromethylsilane is ${\left({\text{CH}}_{\text{3}}\right)}_{\text{2}}{\text{SiCl}}_{\text{2}}$. It is formed by the reaction of ${\text{CH}}_{\text{3}}\text{Cl}\left(\text{g}\right)$ and $\text{Si}\left(\text{s}\right)$. Silicon powder is made to react with ${\text{CH}}_{\text{3}}\text{Cl}\left(\text{g}\right)$ at a temperature of $300°\text{C}$ in the presence of copper as a catalyst.

According to ideal gas equation,

$pV=nRT$

$Numberofmoles=\frac{Mass}{Molarmass}$

(c)

Interpretation Introduction

Interpretation:

The mass of ${\left({\text{CH}}_{\text{3}}\right)}_{\text{2}}{\text{SiCl}}_{\text{2}}$ produced in the reaction has to be determined.

Concept introduction:

Silicons are prepared by using dichloromethylsilane. The formula for  dichloromethylsilane is ${\left({\text{CH}}_{\text{3}}\right)}_{\text{2}}{\text{SiCl}}_{\text{2}}$. It is formed by the reaction of ${\text{CH}}_{\text{3}}\text{Cl}\left(\text{g}\right)$ and $\text{Si}\left(\text{s}\right)$. Silicon powder is made to react with ${\text{CH}}_{\text{3}}\text{Cl}\left(\text{g}\right)$ at a temperature of $300°\text{C}$ in the presence of copper as a catalyst.

$Mass=Numberofmoles\times Molecularmass$