The sum of basicities of $H_{3} {P O}_{4}, H_{3} {P O}_{2}$ and $H_{3} {P O}_{3}$ is:

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Solution

$H_{3} {P O}_{4}$ is tribasic

$H_{3} {P O}_{2}$ is monobasic

and $H_{3} {P O}_{3}$ is dibasic so total basicity is 3+1+2 = 6.

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