浓度为1mol·kg-1的CuSO4浓度的离子强度I1,浓度为1mol·kg-1的NaCl浓度的离子强度I2,那么I1与I2的关系为
A.I1=3I2
B.I1=I2
C.I1=4I2
D.I1=2I2
正确答案是C
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