According the Bronsted and Lowry , an acid is a……………….. A base is ………………..

Explanation

**Step-by-Step Solution:**

1. **Understanding the Bronsted-Lowry Theory**: The Bronsted-Lowry theory defines acids and bases in terms of proton (H⁺) transfer.

2. **Definition of an Acid**: According to the Bronsted-Lowry concept, an acid is defined as a substance that donates a proton (H⁺) to another substance. This means that acids are proton donors.

3. **Definition of a Base**: Conversely, a base is defined as a substance that accepts a proton (H⁺) from another substance. This means that bases are proton acceptors.

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