問題詳情

20. Which of the following statements concerning titration are INCORRECT?
(A) The pH at the midpoint, the point halfway on the titration curve to the equivalence point, is equalto the pKa of the weak acid.
(B) The pKa values of a diprotic acid H2A are

= 8.00. At pH 9.00, the majorspecies are


(C) The equivalent volume for titrating 50.00 mL of a solution (0.05 M in iodide ions and 0.08 M inchloride ions) with 0.1 M silver nitrate is 60 mL.
(D) In EDTA titration, ammonia often is required to prevent the precipitation of metal ions.

參考答案

答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增