What properties would you expect for cao? select all that apply.

Answer is:

It is likely soluble in water.

It will likely light up a bulb in a conductivity apparatus (CaO(l)).

It will likely have a high melting point.

1) Calcium oxide (CaO) has ionic bonds between calcium cations (Ca²⁺) and oxygen anions (O²⁻). It reacts with water and form calcium hydroxide:

CaO(s) + H₂O(l) → Ca(OH)₂(aq).

2) Ionic solid calcium oxide dissolved in water conduct electricty due to the dissociation Ca(OH)₂(aq) → Ca²⁺(aq) + 2OH⁻(aq).

3) Because it has strong ionic bonds, it has high melting point (around 2600°C).

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