а) S + O2 = SO2
SO2 + 2NaOH = Na2SO3 + H2O
Na2SO3 +2 HCl = 2NaCl + SO2 + H2O
б) S + O2 = SO2
SO2 + 2O2 = 2SO3
SO3 + H2O = H2SO4
H2SO4 + 2NaOH = Na2SO4 + 2H2O
в) S + H2 = H2S
2H2S + 3O2 + 2SO2 + 2H2O
2SO2 + O2 = 2SO3
SO3 + H2O = H2SO4
г) S + H2 = H2S
2H2S + 3O2 = 2SO2 + 2H2O
2SO2 + O2 = 2SO3
SO3 + H2O= H2SO4
2H2SO4 + Cu = CuSO4 + SO2 + 2H2O
CuSO4 + BaCl2 = CuCl2 + BaSO4
д) 2ZnS + 3O2 = 2ZnO + 2SO2
SO2 + 2NaOH = Na2SO3 + H2O
Na2SO3 + Pb(NO3)2 = 2NaNO3 + PbSO3
е) 4FeS2 + 11O2 = 2Fe2O3 + 8SO2
2SO2 + O2 = 2SO3
SO3 + H2O = H2SO4
А)Cu(OH)₂+2HCl=CuCl₂+2H2O
Cu(OH)₂+2H⁺ + 2Cl⁻=Cu²⁺ + 2Cl⁻ +2H2O
Cu(OH)₂+2H⁺ =Cu²⁺ +2H2O
б)Na₂CO₃+H₂SO₄=Na₂SO₄+H₂O+CO₂
2Na⁺ + CO₃²⁻ +2H⁺ + SO₄²⁻ =2Na⁺ + SO₄²⁻ +H₂O+CO₂
CO₃²⁻ +2H⁺ =H₂O+CO₂
в)Fe(OH)₂ +2HCl = FeCl₂ + 2H₂O
Fe(OH)₂ +2H⁺ + 2Cl⁻ = Fe²⁺ + 2Cl⁻ + 2H₂O
Fe(OH)₂ +2H⁺ + = Fe²⁺ + 2H₂O
MgO + H2O = Mg(OH)2 реакция обмена
CaO + HNO3 = Ca(NO3)2 + H2O реакция ионного обмена
<span><span>2 <span>NH3</span></span> + <span>3 <span>CuO</span></span> → <span>3 <span>Cu0</span></span> + <span>N20</span> + <span>3 <span>H2<span>O
</span></span></span></span>NH3 + HCl → NH4Cl<span>
</span><span><span>4 <span>NH3</span></span> + <span>5 <span>O2</span></span> → <span>4 <span>NO</span></span> + <span>6 <span>H2<span>O
С NaCl не реагирует.</span></span></span></span>
11C.
Дано:
C6H12O6 - глюкоза
M(C6H12O6)-?
w(C/C6H12O6)-?
Решение:
M(C6H12O6)=(12*6)+12+(16*6)=180г/моль
w(э/вещ-ве)=Ar(э)*k/M(вещ-ва)*100%
w(C/вещ-ве)=12*6/180*100%=40%
Ответ: M(C6H12O6)=180г/моль ; w(C/C6H12O6)=40%
12С.
Дано:
w(S)=50%
w(C)=50%
МФ-?
Решение:
n(C)=w/S
n(C)=50/32=1,56
n(S)=w/C
n(S)=50/12=4,46
1,56:4,46 |:1,56
1:2
CS2 - сероуглерод