dat:mKCl=x;mNH4Cl=y;mNH4NO3=z
x+y+z=22.15
nNH4+=nNH4Cl+nNH4NO3=y/53.5+z/80
BTngtu ngto
nNH3=nNH4+
=>y/53.5+z/80=0.25
nCl-=nKCl+nNH4Cl=x/74.5+y/53.5
khi cho lg gap doi thi nAgCl=0.6=>khi cho lg nhu ban dau thi nAgCl=0.3
Cl-+Ag+-->AgCl
0.3             0.3
=>x/74.5+y/53.5=0.3
=>x=7.45
y=10.7
z=4

nhan biet cho NaOH du vao 3 mau thu dat Qui tim am len ***ng ong nghiem roi dun Qui xanh =>NH4Cl va NH4NO3 nhan biet dc KCl; tiep tuc trich 2 mau thu con lai cho AgNO3 vao kt trang AgCl nhan biet NH4Cl, chat con lai NH4NO3