3цепочки, 25 18. zns-h2s-k2s-h2s-so2-k2so3 19. - вопрос №81495643251822222319222342 от muradyanarutyun 11.07.2020 15:06

Question

Химия: 3цепочки, 25 18. zns-h2s-k2s-h2s-so2-k2so3 19. ca-ca(oh)2-ca(no2)2-hno3-nh4no2 20. al2o3-alcl3-al(oh)3-al2o3-al2(so4)3

muradyanarutyun · Answer

18.ZnS + 2HCl → ZnCl₂ + H₂S↑K + H2S = K2S + H2K2S + 2HCl = 2KCl + K2S2H₂S + 3O₂ → 2SO₂↑ + 2H₂OSO2 + 2KOH = H2O + K2SO319. Ca + 2H2O=Ca(OH)2 + H2Ca(OH)2 + 2HNO2= Ca(NO2)2+2H2OCa(NO2)2 + 2H2O = Ca(OH)2 + 2HNO25NH4HCO3 + 3HNO3 = 4NH4NO2 + 6H2O + 5CO220.4Al + 3O2 = 2Al2O3Al2O3 + 6HCl = 2AlCl3 + 3H2OAlCl3 + 3NaOH = Al(OH)3 + 3NaClAl(OH)3 + NaOH = Na[Al(OH)4]2Al(OH)3 + 3H2SO4 = Al2(SO4)3 + 6H2O...