Question

Which of the following is a tribasic acid?

• A. $H_{3}P{O}_4$
• B. $HP{O}_3$
• C. $H_4{P}_2{O}_7$
• D. $H_4{P}_2{O}_6$

Answer 1

Answer: (A)

$H_{3}P{O}_4$ (orthophosphoric acid) is a tribasic acid because it has three replaceable hydrogen atoms.