What ion do alkalis form when added to water?

1 Answer
Nov 21, 2016


They form alkali metal cations and hydroxide ions.


And we represent this by the given reaction:

#M(s) + H_2O(l) rarr M^(+)(aq) + HO^(-)(aq) + 1/2H_2(g)#

#M=Li, Na, K, etc.#

The alkali metals become increasingly more reactive as we descend the Group.