Cн(KOH) =Cм(KOH) Cм(KOH)=0,4моль/л; m(KOH)=0,4*56=22,4г-в 1 литре р-ра, а в 200мл - 22,4/5=4,48г. m(H2O)=200-4,48=195,52г. m( KOH)=4,48г ОТВЕТ: m(H2O)=195,52г ...................................................................................................................................................................... ......................................................................................................................................................................