Oh no! You got this question incorrect.
No worries! I'll explain how to properly answer this question.
In order to answer these questions you must remember that a conjugate acid gains a proton (H+) and a conjugate base looses a proton. Question: What is the acid in this equation: HPO₄ ²⁻ base + H₂O acid --> OH⁻ conjugate base + H₂PO⁴⁻ conjugate acid In this equation, HPO₄ ²⁻ gains a proton to form H₂PO⁴⁻. This means that HPO₄ ²⁻ is the base and H₂PO⁴⁻ is the conjugate acid. In addition to this, H₂O looses a proton to form OH⁻. This means that in this equation, H₂O is the acid and OH⁻ is the conjugate base. |
Key:
Acid - Proton donor Base - Proton receiver |