Q.6.31 - An Introduction to General, Organic, and Biological Chemistry

Question

Write the formula for each of the following compounds:

a. Cobalt (III) chloride

b. Lead (IV) oxide

c. Silver sulfide

d. Bismuth (V) chloride

e. Copper (I) phosphide

f. Chromium (II) chloride

Step-by-Step Solution

Answer

a. The formula for a compound is ${\mathrm{CoCl}}_3$.

b. The formula for a compound is ${\mathrm{PbO}}_2$.

c. The formula for a compound is ${\mathrm{Ag}}_2\mathrm{S}$.

d.  The formula for a compound is ${\mathrm{BiCl}}_5$

e. The formula for a compound is ${\mathrm{Cu}}_3\mathrm{P}$.

f. The formula for a compound is ${\mathrm{CrCl}}_2$.

Step 1: Part (a) Given information

To give the formula for Cobalt (III) chloride .

Step 2: Part (a) Explanation

A binary ionic compound is one that is derived from two elements where one is metal while the other is non-metal. 

 

The naming of a binary ionic compound can be done using the following rules:

 

1. Firstly, a metallic element is written with its full name.
2. It is then followed by the stem of a non-metallic element and the suffix “-ide” is added after it.

The given compound is Cobalt (III) chloride. It is made up of Cobalt $\left(C{o}^{3+}\right)$ and chloride $\left(C{l}^{-}\right)$ ions.

Thus, the formula of the given ionic compound is ${\mathrm{CoCl}}_3$.

Step 1: Part (b) Given information

To give the formula for Lead (IV) oxide 

Step 2: Part (b) Explanation

A binary ionic compound is one that is derived from two elements where one is metal while the other is non-metal. 

 

The naming of a binary ionic compound can be done using the following rules:

 

1. Firstly, a metallic element is written with its full name.
2. It is then followed by the stem of a non-metallic element and the suffix “-ide” is added after it.

The given compound is Lead (IV) oxide. It is made up of Lead (IV)$\left(P{b}^{4+}\right)$  and oxide $\left(O^{2-}\right)$ ions.

Thus, the formula of the given ionic compound is ${\mathrm{PbO}}_2$.

Step 1: Part (c) Given information

To give the formula for Silver sulfide.

Step 2: Part (c) Explanation

A binary ionic compound is one that is derived from two elements where one is metal while the other is non-metal. 

 

The naming of a binary ionic compound can be done using the following rules:

 

1. Firstly, a metallic element is written with its full name.
2. It is then followed by the stem of a non-metallic element and the suffix “-ide” is added after it.

The given compound is Silver sulfide.  It is made up of silver  $\left(A{g}^{+}\right)$ and sulfide  $\left(S^{2-}\right)$ions.

Thus, the formula of the given ionic compound is ${\mathrm{Ag}}_2\mathrm{S}$.

Step 1: Part (d) Given information

To give the formula for Bismuth (V) chloride 

Step 2: Part (d) Explanation

A binary ionic compound is one that is derived from two elements where one is metal while the other is non-metal. 

 

The naming of a binary ionic compound can be done using the following rules:

 

1. Firstly, a metallic element is written with its full name.
2. It is then followed by the stem of a non-metallic element and the suffix “-ide” is added after it.

The given compound is Bismuth (V) chloride. It is made up of bismuth $\left({\mathrm{Bi}}^{5+}\right)$ and chloride$\left({\mathrm{Cl}}^{-}\right)$ ions.

Thus, the name of the formula of the given ionic compound is ${\mathrm{BiCl}}_5$ .

Step 1: Part (e) Given information

To give the formula of Copper (I) phosphide 

Step 2: Part (e) Explanation

A binary ionic compound is one that is derived from two elements where one is metal while the other is non-metal. 

 

The naming of a binary ionic compound can be done using the following rules:

 

1. Firstly, a metallic element is written with its full name.
2. It is then followed by the stem of a non-metallic element and the suffix “-ide” is added after it.

The given compound is Copper (I) phosphide . It is made up of copper$\left(C{u}^{+}\right)$ and phosphide $\left(P^{3-}\right)$ions.

Thus, the formula of the given ionic compound is ${\mathrm{Cu}}_3\mathrm{P}$.

Step 1: Part (f) Given information

To give the formula of Chromium (II) chloride.

Step 2: Part (f) Explanation

A binary ionic compound is one that is derived from two elements where one is metal while the other is non-metal. 

 

The naming of a binary ionic compound can be done using the following rules:

 

1. Firstly, a metallic element is written with its full name.
2. It is then followed by the stem of a non-metallic element and the suffix “-ide” is added after it.

The given compound is Chromium (II) chloride. It is made up of chromium$\left(C{r}^{2+}\right)$ and chloride $\left(C{l}^{-}\right)$ ions.

Thus, the formula of the given ionic compound is ${\mathrm{CrCl}}_2$.