Is calcium oxide an acidic or basic or neutral oxide?

Answer 1

Calcium carbonate, CaCO3, is the salt of a strong base (calcium hydroxide), Ca(OH)2 and a weak acid (carbonic acid ), H2CO3. Thus, the salt when dissolved in water will be basic, i.e. pH >7.

Answer 2

Calcium oxide, like most metal oxides, is basic.

Answer 3

It is alkaline. Mineral like in sea salt and a mineral supplement are alkaline.

Answer 4

It is strong basic.
all hydroxides are basic
All hydroxides are alkaline (above pH 7). Most hydroxides are strongly alkaline.

Answer 5

Calcium Oxide - also known as quicklime, is very basic.

Answer 6

Calcium oxide (CaO) , is a metal oxide. Like other metal oxides it is a basic oxide because it dissolves in water to form calcium hydroxide.

CaO (s) + H2O (l) → Ca(OH)2 (aq)