Yes, sodium oxide (Na₂O) dissolves in water, but it reacts vigorously with water to form a strongly alkaline solution.

Here's the reaction:

Na₂O(s) + H₂O(l) → 2NaOH(aq)

This reaction produces sodium hydroxide (NaOH), which is a strong base. The solution becomes very hot due to the exothermic nature of the reaction.

Important Note: Handling sodium oxide should be done with extreme caution due to its reactivity with water. It can cause severe burns and should always be handled with appropriate safety equipment.