Question

Give an example of trivalent cation and monovalent anion. Write the formula of compound formed by their combination.

Answer 1

Compound can be Al2O3.

In which Al is +3

And there is Cl which is -1.

Al+3Cl= AlCl3.

Hope this example helps you.

Answer 2

$Al^{3+}$ and $Cl^{-}$ are examples of trivalent cation and monovalent anion respectively. The formula of compound formed by their combination is $AlCl_3$

Explanation:

The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.

Trivalent cation is formed when a metal loses three electrons. Example: $Al^{3+}$.

Monovalent anion is formed when a non metal gains one electron. Example: $Cl^{-}$.

For formation of a neutral ionic compound, the charges on cation and anion must be balanced. Thus $Al^{3+}$ and $Cl^{-}$ combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral $AlCl_3$

Learn more about neutral ionic compounds

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