Sum of basicity of H3PO4
, H3PO3
and H3PO2
is equal to:
A. 3
B. 4
C. 5
D 6

To determine the sum of basicity of H3PO4, H3PO3, and H3PO2, we need to understand their acidic properties.

H3PO4 is phosphoric acid and has three ionizable protons (H+ ions) that can be donated. Hence, it has a basicity of 3.

H3PO3 is phosphorous acid and has two ionizable protons (H+ ions). It can donate two protons, so its basicity is 2.

H3PO2 is hypophosphorous acid and has one ionizable proton (H+ ion). It can donate only one proton, so its basicity is 1.

Therefore, the sum of the basicity of H3PO4, H3PO3, and H3PO2 is 3 + 2 + 1 = 6.

The correct answer is option D: 6.