P₂O₅ + 3H₂O = 2H₃PO₄
M(P₂O₅) = 31 * 2 + 16 * 5 = 142 г/моль
M(H₃PO₄) = 1 * 3 + 31 + 16 * 4 = 98 г/моль
m(H₃PO₄) = (28,4 * 98 * 2) : (142 * 1) = 39,2 г - теоретический выход
ω\% = 36 : 39,2 * 100 \% = 91,84 \% - выход кислоты
СH3COH + H2 -> CH3-CH2-OH ( p,kat)
CH3-CH2-OH + CH3COOH = CH3COOCH2-CH3 + H2O (H)
CH3COOCH2-CH3 + H2O = CH3COOH + CH3-CH2-OH (H)
1) S + O2 = SO2
2) SO2 + 2KOH = K2SO3 + H2O
3) K2SO3 + 2HCl = 2KCl + SO2 + H2O
4) 2SO2 + O2 = 2SO3
5) SO3 + H2O = H2SO4
6) H2SO4 + Ca(OH)2 = CaSO4 + 2H2O
7) SO3 + 2NaOH = Na2SO4 + H2O
8) Na2SO4 + Ba(NO3)2 = BaSO4 + 2NaNO3
50 г = 100%
х г = 30%
50/100 = х/30
х = 1500/100 = 15 г
NH3 + HCl = NH4Cl
15/36.5 = y/53.5
y = (15*53.5)/36.5 = 21.99 г