Q. 6.38 - An Introduction to General, Organic, and Biological Chemistry

Question

Name the following polyatomic ions :

a. ${\mathrm{OH}}^{-}$         b. ${\mathrm{PO}}_4^{3-}$

c. ${\mathrm{CN}}^{-}$         d. ${\mathrm{NO}}_2^{-}$

Step-by-Step Solution

Answer

a. The name of the polyatomic ion ${\mathrm{OH}}^{-}$ is hydroxide.

b. The name of the polyatomic ion ${\mathrm{PO}}_4^{3-}$ is Phosphate.

c. The name of the polyatomic ion ${\mathrm{CN}}^{-}$ is cyanide.

d. The name of the polyatomic ion ${\mathrm{NO}}_2^{-}$ is nitrite.

Part (a) Step 1 : Given information

We have to write the name of  ${\mathrm{OH}}^{-}$  polyatomic ion.

Part (a) Step 2 : Simplification

• The chemical name of the polyatomic ion is Hydroxide.
• Hydroxide is composed of $\mathrm{H}$(hydrogen) and $\mathrm{O}$(oxygen)

Part (b) Step 1 : Given information

We have to write the name of  ${\mathrm{PO}}_4^{3-}$  polyatomic ion.

Part (b) Step 2 : Simplification

• The chemical name of the polyatomic ion is Phosphate.
• Phosphate is composed of $\mathrm{P}$(Phosphorus) and $\mathrm{O}$(oxygen)

Part (c) Step 1 : Given information

We have to write the name of ${\mathrm{CN}}^{-}$  polyatomic ion.

Part (c) Step 2 : Simplification

• The chemical name of the polyatomic ion is cyanide.
• Cyanide is composed of $\mathrm{C}$(carbon) and $\mathrm{N}$(nitrogen)

Part (d) Step 1 : Given information

We have to write the name of  ${\mathrm{NO}}_2^{-}$ polyatomic ion.

Part (d) Step 2 : Simplification

• The chemical name of the polyatomic ion is nitrite.
• Nitrite is composed of $\mathrm{N}$(nitrogen) and $\mathrm{O}$(oxygen)