Which of the following is the conjugate acid of HPO₄^2- A) H₃PO₄ B) H₂PO₄- C) PO₄^3- D) H₃O⁺

Question

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In order to find the conjugate acid, we need to add a proton (H+) to the molecule. The H+ will combine with one of the negatively charged oxygens. In option B, the H+ is added to the S atom, creating H₂. This is the correct conjugate acid. Option A has the correct elements but the H+ is added to the wrong atom. Option C has a different molecule altogether. Option D has the correct elements but the H+ is added to the wrong atom.

Which of the Following Is the Conjugate Acid of HPO42-

Which of the Following Is the Conjugate Acid of HPO₄^2-