Slaked lime (Ca(OH)₂), is a commonly used flocculant. How can you prepare Ca(OH)2 from calcium metal?

Indium (III) oxide (In₂O₃) is an amphoteric oxide. Write the balanced net ionic equation for the reaction between In₂O₃ and aqueous H₂SO₄.

Formulate the net ionic equation for the interaction between sodium oxide (Na₂O) and water.