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

• KI

• Fe2O3

• (NH4)3PO4

Verified Answer :

meerkat18

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 :

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.

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