total volume =25+25=50 ml total millimoles of KI=25*0.2=5 conce=millimoles/volume in ml =5/50=0.1 similarly for other compound 25*0.2/50=0.1 Solution total volume =25+25=50 ml total millimoles of KI=25*0.2=5 conce=millimoles/volume in ml =5/50=0.1 similarly for other compound 25*0.2/50=0.1.