Question

对牲畜动手术时常用1.5%的AgKNO3溶液做消毒剂.现用4.5%的AgNO3溶液200g来配制1.5%的AgNO3溶液

Answer 1

m(Ag)=200*4.5% m(h2o)=m(Ag)/1.5%-200=400