What happens when metal oxides soluble in water react with it?

When metal oxides soluble in water react with it, they form metal hydroxides. The metal oxide reacts with water to produce metal hydroxide, releasing heat in the process. This reaction is typically termed as the hydrolysis of metal oxides. For example, the reaction of sodium oxide (Na₂O) with water can be represented as:
Na₂O(s) + H₂O(l) → 2NaOH(aq)
Here, sodium oxide reacts with water to produce sodium hydroxide (NaOH) in solution. This hydrolysis reaction is a fundamental process in understanding the behavior of metal oxides, particularly those that are soluble in water.