Which concept can justify that `CaO + SO_(3) rarr CaSO_(4) ` is an acid-base reaction ?

Explanation

To justify that the reaction \( \text{CaO} + \text{SO}_3 \rightarrow \text{CaSO}_4 \) is an acid-base reaction, we can analyze the components involved based on the Lewis acid-base theory. Here’s a step-by-step solution:

### Step 1: Identify the Reactants
The reactants in the reaction are calcium oxide (CaO) and sulfur trioxide (SO₃).

### Step 2: Classify the Reactants
- **Calcium Oxide (CaO)**: This is a metal oxide. Calcium is a metal, and metal oxides are generally basic in nature. Therefore, CaO can act as a Lewis base because it can donate an electron pair.

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