Orthoboric acid is a ................. basic acid.

Explanation

To answer the question "Orthoboric acid is a __________ basic acid," we can follow these steps:

### Step 1: Understand the Structure of Orthoboric Acid
Orthoboric acid has the chemical formula H₃BO₃. It consists of one boron atom (B) bonded to three hydroxyl groups (OH).

**Hint:** Remember that the structure of a compound can give insights into its properties.

### Step 2: Analyze the Valence Electrons
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