What is the conjugate base of H2PO4− ? State the formula of the conjugate base of H2PO4-HPO4^2-ii) State the formula of the conjugate acid of H2PO4-H3PO4 iii) A solution of calcium dihydrogenphosphate Ca(H2PO4)2 in water acts as a buffer solution. Anonymous. A. H2CrO-4 B. H2CrO4 C. CrO4 D. CrO42- E. H2CrO42- FREE Expert Solution Show answer. Has no conjugate acid, as it is an acid. Anonymous. For the best answers, search on this site https://shorturl.im/8dmlP. C) The weaker the conjugate base. The H2PO4- ion has both a conjugate acid and a conjugate base. 9 years ago . Dihydrogen phosphate has the formula H 2 PO 4-and is a polyatomic ion. 3 Answers. C) H2PO3- is the conjugate base. Anonymous. Conjugate acids and conjugate bases are pairs. Get your answers by asking now. D) more than one correct response E) no correct response The conjugate acid of HPO42- is H2PO4- , just one proton more for conjugated acids than in the base A) HPO42-B) PO43- C) H3PO4 D) H3O+ E) OH− A. A) The stronger the conjugate acid. 6 years ago. Conjugate Acid Of H2po4. 0 1. Favorite Answer. A. H 2 CrO-4 B. H 2 CrO 4 C. CrO 4 D. CrO 4 2-E. H2CrO 4 2-Learn this topic by watching Conjugate Acids and Bases Concept Videos. Answer Save. H2PO4- is the conjugate of H3PO4 and the conjugate of HPO42- View Available Hint(s) O acid / acid O acid / base O base / acid O base / base Submit Provide Feedback Get more help from Chegg Get 1:1 help now from expert Chemistry tutors H3PO4 is a tribasic acid, thus ionising in three steps.The conjugate base is formed when an acid loses its proton. D) The weaker the conjugate acid. Thus, HPO42- is the conjugate base of H2PO4- (which is an acid in step II, but is the conjugate base of H3PO4 in step I) Still have questions? Source(s): https://shrink.im/a0ffX. do a search on yahoo or google. b. H3PO4. 92% (22 ratings) Problem Details. What is the conjugate acid of HCrO 4 – ? It's also a conjugate base. Problem: What is the conjugate acid of HCrO 4– ? I have no idea what to write. I hate buffer solutions. C. Place the following in order of increasing acid strength. The stronger the acid, then which of the following is TRUE? B) HPO42- is the conjugate base. 9 years ago. 5 years ago. It is true that A) H3PO4 is the conjugate acid. E) None of the above. Anonymous. 0 0. 0 3. H3PO4. congugate acid is H+ and conjugate base is PO4-0 0. Ask Question + 100. Relevance. B) The stronger the conjugate base. e. [H2PO4]+ Please explain why. Suggest, with the aid of equations, how this buffering action takes place. Arrgh. think about it this way, what acid could loose a hydrogen ion(s) to make [H2PO4]-. just that can assist! problematic subject.