CaF2饱和溶液的浓度是2×10-4摩/升,它的溶度积常数是( )
A. 2.6×10-9
B. 4×10-8
C. 3.2×10-11
D. 8×10-12
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Fe2S3的溶度积表达式是( )
A. Ksp = [Fe3+][S2-]
B. Ksp = [Fe23+][S32-]
C. Ksp = [Fe3+]2[S2-]3
D. Ksp = [2Fe3+]2[3S2-]3
Mg(OH)2的溶度积为1.2×10-11(18℃),在该温度时,下列pH值中,哪一个是Mg(OH)2饱和溶液的pH值?( )
A. 10.16
B. 7
C. 5
D. 3.15
假设Sb2S3的溶解度为x,则Sb2S3的溶度积应为( )
A. Ksp = x2·x3 = x5
B. Ksp = 2x·3x = 6x2
C. Ksp = x·x = x2
D. Ksp = (2x)2·(3x)3 = 108x5
下列试剂中能使CaSO4(s)溶解度增大的是( )
A. CaCl2
B. Na2SO4
C. NH4Ac
D. Ca(OH)2