Question

Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name.

Answer 1

KI is the chemical formula of potassium iodide. KI is a white solid salt under room temperature and pressure. Fe2O3 is the chemical formula of iron (III) oxide is a red-brown solid that exists under normal conditions. (NH4)3PO4 is called ammonium phosphate. This is a really unstable salt with no commercial value.

Answer 2

Answer :

The name of compound $KI$ is, potassium iodide.

The name of compound $Fe_2O_3$ is, iron (III) oxide.

The name of compound $(NH_4)_3PO_4$ is, ammonium phosphate.

Explanation :

Ionic compound : It is a type of compound that is made up of the ions of the two different elements in which one element is a metal and another element is a non-metal.

The rules of ionic compounds is given by:

• Positive ion is written first.
• The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.
• In case of transition metals, the oxidation state are written in roman numerals in bracket in-front of positive ions.

(1) The given compound $KI$ is an ionic compound. It is made up of two different ions which are potassium ion $(K^+)$ and iodide ion $(I^-)$.

So, the name of $KI$ is, potassium iodide.

(2) The given compound $Fe_2O_3$ is an ionic compound. It is made up of two different ions which are iron ion $(Fe^{3+})$ and oxide ion $(O^{2-})$.  In this an oxidation state of iron is (+3).

So, the name of $Fe_2O_3$ is, iron (III) oxide.

(3) The given compound $(NH_4)_3PO_4$ is an ionic compound. It is made up of two different ions which are ammonium ion $(NH_4^+)$ and phosphate ion $(PO_4^{3-})$.

So, the name of $(NH_4)_3PO_4$ is, ammonium phosphate.