Why is MgO a Lewis base?

1 Answer
Mar 4, 2016

Answer:

#O^(2-)# in #MgO# acts as donor of lone pair of electron to #H^+#

Explanation:

When water is added #O^-2#ion in it forms #OH^-# by donating lone pair of electron to #H^+# formed by ionisation of #H_2O#

Thus
#H_2OrightleftharpoonsH^+ +OH^-#

#O^-2 +H^+=OH^-#