СaO + H2O= Ca(OH)2 (гашение извести)
Ba(OH)2 + H2SO4 = BaSo4(осадок) + H2O
H2SO4 + CaO = CaSO4 + H2O
Mg+2H2O = Mg(OH)2 + Н2
Al⁺³P⁺⁵O⁻²₄
(+3) + (+5) + 4*(-2) = 0
Ca⁺²(N⁺³O⁻²₂)₂
(+2) + 2*(+3) + 2*2*(-2) = 0
Li⁺¹H⁺¹S⁺⁶O⁻²₄
(+1) + (+1) + (+6) + 4*(-2) = 0
2C2H6 + 7O2 = 4CO2 + 6H2O
n(C2H6) = <span>1,4 моль
n(O2) = </span><span>1,4*7/2 = 4.9 моль
V(O2) = </span><span>4.9*22,4 = 109,76 л</span>
<span>Ca + Cl2 = CaCl2</span>
<span>CaCl2 + Na2CO3 = CaCO3 + NaCl</span>
<span>CaCO3 ---t---> CaO + CO2</span>
<span>Ca(HCO3)2 ---t---> CaCO3 + H2O + CO2</span>
<span>CaCO3 + CO2 + H2O = Ca(HCO3)2</span>