Question

Species acting as both bronsted acid and base is

• A. HSO4–
• B. Na2CO3
• C. NH3
• D. OH–

Answer 1

Answer: (A)

HSO4–

Answer 2

HSO4– – can accept and donate a proton. HSO4– + H+ $\rightarrow$ H2SO4 ; HSO4– $\rightarrow$ H+ + $SO_{4}^{2 -}$