Mr(C4H8O2)=4*12+8*1+2*16=88
W(C)=48/88=0.546=54.6%
2NaOH+H₂SO₄ ->Na₂SO₄+2H₂O
FeCl₂+2KOH ->2KCl+Fe(OH)₂↓
K₂CO₃+H₂SO₄ ->K₂SO₄+H₂O+CO₂↑
K₃PO4+NaCl ->не пойдет
1. mBaCl2=320g·0.13=41.6g
41.6g xg
BaCl2+H2SO4=BaSO4↓+2HCl
208g 233g
x=41.6·233/208=46.6g
2. mNH4Cl=82.3·0.13=10.7g
10.7g x L
NH4Cl+NaOH=NH3↑+NaCl+H2O
52.5g 22.4L
x=10.7·22.4/52.5=4.5L