Question:
What is the best description of the change that occurs when Na2O(s) is dissolved in water
Answer:
In water Na2O dissociates as -
Na2O + H2O → 2Na+ + O2-
The oxide ion formed can form hydrgen bonds with water and is stabilised. Thus it is easy for Na2O and all other oxides to dissolve in water as it brings about further stability in the system.
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