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Answer: H3PO3has a basicity of 2.
Definition
The term “basicity” refers to the number of hydrogen atoms that can be replaced. The number of acidic hydrogen atoms in a molecule determines its basicity. Hydrogen must be bonded to a strongly electronegative atom, such as oxygen or fluorine, in order to be acidic.
H3PO3is also known as phosphoric acid or orthophosphorous acid. It belongs to the group of phosphorus oxygenic acids. Phosphorous acid (H3PO3) generates phosphites, which are employed as reduction agents in some cases.
H3PO3→2H+ + HPO4–
To be acidic, hydrogen must be bound to a strongly electronegative atom. There are two P-OH bonds and one P-H bond in it. As a result, its basicity is 2. It’s connected to two oxygen cylinders here. As a result, H3PO3has a basicity of 2.
