Дано
Сr₂(SO₄)₃·6H₂O
Найти:
w(Сr)-? w(S)-? w(O)-? w(H)-?
m(Сr):m(S):m(O):m(H)

Mr(Сr₂(SO₄)₃·6H₂O)=52×2+((32+16×4)×3)+(6×(1×2+16))=500 W(Cr)=52*2/500*100=10,4% m(Cr)=52*2=104 W(S)=32*3/500*100=19,2% m(S)=32*3=96 W(O)=16*4*3+16*6=288/500*100=57,6% m(O)=16*4*3+16*6=288 W(H)=1*2*6=12/500*100=2,4% M(H)=1*2*6=12