試題詳解

複選題
10. Which of the following nts related to the acid sal: NaHA and polyprotic acid titration is (are) correct? (AB) NaHlA can act as a proton donor and also as the conjugate base of the parent acid I H₂A. (AC) Solutions of acid salis are acidic. (AD)The pH of a NaHA solu lution can be cal (AE) A solution having the same e calculated by only treating NatlA as an acid. lution obtained by dissolving NaHtA in pure water cannat be obtained during the process wi "d with NaOH (BC) It is possible to titrate all three protons of phosphoric acid in aqueous solution. (BD)A titration by NaOH of a mixture of H₃PO₄, and NallbH₂PO₄containing phensiphthalein to the the second end point gives the numher of millimoles of NaH₂PO₄.