已知H3PO4的PKa1=2.12 PKa2=7.21 PKa3=12.67 若配置成ph=7.0的缓冲溶液应选择的A.H3PO4~H2PO4-B.H2PO4-~HPO42-C.HPO42-~PO43-D.H3PO4~HPO42-

已知H3PO4的PKa1=2.12 PKa2=7.21 PKa3=12.67 若配置成ph=7.0的缓冲溶液应选择的A.H3PO4~H2PO4-B.H2PO4-~HPO42-C.HPO42-~PO43-D.H3PO4~HPO42-
已知H3PO4的PKa1=2.12 PKa2=7.21 PKa3=12.67 若配置成ph=7.0的缓冲溶液应选择的
A.H3PO4~H2PO4-
B.H2PO4-~HPO42-
C.HPO42-~PO43-
D.H3PO4~HPO42-

已知H3PO4的PKa1=2.12 PKa2=7.21 PKa3=12.67 若配置成ph=7.0的缓冲溶液应选择的A.H3PO4~H2PO4-B.H2PO4-~HPO42-C.HPO42-~PO43-D.H3PO4~HPO42-
缓冲溶液的PH值需要遵循的原则是PH=PKa±1 之间,所以只能选择B.H2PO4-~HPO42-

Jiangxi Yongfeng beat 09 rivals to host the National Junior Taekwondo tournament at 12:05 on March 18, 2009 [a comment] [Word Count:] Source: Dajiang - Jiangxi Yongfeng Daily News newspaper Rao Xiaohu...

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