题目内容
(请给出正确答案)
[单选题]
【选择题】今欲用H3PO4与Na2HPO4来配制pH = 7.2的缓冲溶液,则H3PO4与Na2HPO4物质的量之比n(H3PO4)∶n(Na2HPO4)应当是(H3PO4的pKa1~pKa3分别是2.12,7.20,12.36)
A.1:1
B. 1:2
C. 1:3
D. 1:4题目来源:智慧树分析化学网络课程试题库
答案
题目【今欲用H3PO4与Na2HPO4来配制pH = 7.2的缓冲溶液,则H3PO4与Na2HPO4物质的量之比n(H3PO4)∶n(Na2HPO4)应当是(H3PO4的pKa1~pKa3分别是2.12,7.20,12.36)】的答案是:C. 1:3