what properties would you expect for cao? select all that apply. it is likely a gas or liquid at room…

what properties would you expect for cao? select all that apply. it is likely a gas or liquid at room temperature. it is likely soluble in water. it will likely light up a bulb in a conductivity apparatus. it will likely have a high melting point. done

what properties would you expect for cao? select all that apply. it is likely a gas or liquid at room temperature. it is likely soluble in water. it will likely light up a bulb in a conductivity apparatus. it will likely have a high melting point. done

Answer

Answer:

  • It is likely soluble in water.
  • It will likely light up a bulb in a conductivity apparatus.
  • It will likely have a high melting point.

Explanation:

Step1: Analyze state at room - temp

CaO is an ionic compound. Ionic compounds are solid at room - temperature. So, it is not a gas or liquid at room temperature.

Step2: Consider solubility

CaO reacts with water to form calcium hydroxide ($CaO + H_2O=Ca(OH)_2$), so it is likely soluble in water.

Step3: Analyze conductivity

In the molten state or when dissolved in water, ionic compounds like CaO dissociate into ions ($Ca^{2 +}$ and $O^{2 -}$) which can conduct electricity, so it will likely light up a bulb in a conductivity apparatus.

Step4: Analyze melting point

Ionic compounds have strong electrostatic forces between ions. A large amount of energy is required to break these forces, so CaO will likely have a high melting point.