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[单选题]
EDTA与H+及其它金属离子N发生副反应,下列情况只考虑酸效应ay(H)而忽略与其它金属离子副反应系数ay(N)的是()
A.ay(H)=ay(N)
B.ay(H)=10^5ay(N)=10^4
C.ay(H)=10^4ay(N)=10^5
D.ay(H)=10%ay(N)=10^2
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A.ay(H)=ay(N)
B.ay(H)=10^5ay(N)=10^4
C.ay(H)=10^4ay(N)=10^5
D.ay(H)=10%ay(N)=10^2
A . SDS
B . CTAB
C . EDTA
D . CPC