题目

类似于水的离子积，难溶盐AmBn也有离子积Ksp，且Ksp=［C(An+)］m·［C(Bm-)］n。已知常温下BASO4的溶解度为2.33×10-4g,则其Ksp为A.2.33×10-4B.1×10-5C.1×10-10D.1×10-12 答案：C由于BaSO4溶解度较小，其溶液的密度近似于1 g·cm-3，所以，BaSO4溶液中，c(Ba2+)=c()=1×10-5 mol·L-1，则Ksp=1×10-10。26、I want to buy that kind of cloth because I ____ the cloth ___ well． A．have told; washes                                       B．have been told; washes C．was told; washed                                       D．have been told; is washed