Ca(no3)2
ca +2
n (+5)
o (-2)
2CH4=C2H2+3H2
C2H2+2H2=C2H6
C2H6=C2H4+H2
C2H4+Br2=C2H4Br2
<span>а) ZnS+2HCI=ZnCI₂ + H₂S
ZnS+2H⁺+2CI⁻= Zn²⁺+2CI⁻+ H₂S
ZnS+2H⁺ = Zn²⁺ + H₂S↑
б) 2HNO₃+BaO= Ba(NO₃)₂ + H₂O
2H⁺+ 2NO₃⁻+ BaO= Ba²⁺ + 2NO₃ + H₂O
2H⁺ + BaO= Ba²⁺ + H₂O
в)
<span>Na₃PO₄+ 3AgNO₃= 3NaNO₃ + Ag₃PO₄
</span><span>3Na⁺ + PO₄³⁻+ 3Ag⁺ + 3NO₃⁻= 3Na⁺ + 3NO₃⁻ + Ag₃PO₄↓
</span><span> PO₄³⁻+ 3Ag⁺ = Ag₃PO₄↓
г) Mg(OH)₂+H₂SO₄= MgSO₄ + 2H₂O</span>
Mg(OH)₂ + 2H⁺ + SO₄²⁻= Mg²⁺ + SO₄²⁻ + 2H₂O
Mg(OH)₂ + 2H⁺ = Mg²⁺ + 2H₂O
</span>
в приложении.........................
1) 2Ag2O = 4Ag + O2
n (Ag2O) = 23,2 : (108*2+16) = 0,1 моль
n (O2) = 0,05 моль
2) 2 2 2 1
2 2 1
4 2 3
2 3