What do many bases have in common? A. They often release oxygen gas.
B. They often form hydrogen ions.
C. They often release hydrogen gas.
D. They often form hydroxide ions.

D.) They often form hydroxide ions.

Explanation:

They generate hydroxide ions in water. they are soapy to touch and bitter in taste. they conduct electricity.

(all bases have hydroxide ions)

catya that's not even a b or c

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