由K2SO4、Al2(SO4)3、H2SO4及KAl(SO4)2•12H2O组成的混合溶液,测得c(H+)=0.1mol/L,
c(Al3+)=0.5mol/L,c(SO42-)= 0.9mol/L,则c(K+)为
A.0.1 mol/L | B.0.2 mol/L | C.0.3 mol/L | D.0.4 mol/L |
由K2SO4、Al2(SO4)3、H2SO4及KAl(SO4)2•12H2O组成的混合溶液,测得c(H+)=0.1mol/L,
c(Al3+)=0.5mol/L,c(SO42-)= 0.9mol/L,则c(K+)为
A.0.1 mol/L | B.0.2 mol/L | C.0.3 mol/L | D.0.4 mol/L |