H3PO3, also known as phosphorous acid, is not considered a tribasic acid because it can only donate two protons (H+ ions) instead of three.

Here's the step-by-step explanation:

1. The molecular formula of phosphorous acid is H3PO3. This suggests that it could potentially donate three hydrogen ions (H+), which would make it a tribasic acid.

2. However, the structure of the H3PO3 molecule is such that one of the hydrogens is bound to the central phosphorus atom, while the other two are bound to oxygen atoms.

3. In aqueous solution, only the hydrogen ions that are attached to the oxygen atoms are readily donated. The hydrogen attached directly to the phosphorus is not, because the P-H bond is much stronger and does not ionize in water.

4. Therefore, H3PO3 can only donate two protons, making it a dibasic acid, not a tribasic acid.

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H3PO3, also known as phosphorous acid, is not considered a tribasic acid because it can only donate two protons (H+ ions) instead of three.

Here's the step-by-step explanation:

1. The molecular formula of phosphorous acid is H3PO3. This suggests that it could potentially donate three hydrogen ions (H+), which would make it a tribasic acid.

2. However, the structure of the H3PO3 molecule is such that one of the hydrogens is bound to the central phosphorus atom, while the other two are bound to oxygen atoms.

3. In aqueous solution, only the hydrogen ions that are attached to the oxygen atoms are readily donated. The hydrogen attached directly to the phosphorus is not, because the P-H bond is much stronger and does not ionize in water.

4. Therefore, H3PO3 can only donate two protons, making it a dibasic acid, not a tribasic acid.

Knowee AI · Accepted Answer

H3PO3, also known as phosphorous acid, is not considered a tribasic acid because it can only donate two protons (H+ ions) instead of three.

Here's the step-by-step explanation:

1. The molecular formula of phosphorous acid is H3PO3. This suggests that it could potentially donate three hydrogen ions (H+), which would make it a tribasic acid.

2. However, the structure of the H3PO3 molecule is such that one of the hydrogens is bound to the central phosphorus atom, while the other two are bound to oxygen atoms.

3. In aqueous solution, only the hydrogen ions that are attached to the oxygen atoms are readily donated. The hydrogen attached directly to the phosphorus is not, because the P-H bond is much stronger and does not ionize in water.

4. Therefore, H3PO3 can only donate two protons, making it a dibasic acid, not a tribasic acid.

H3PO3 is not a tribasic acid.

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