Caco3–cacl2–ca–cao–ca(oh)2–caco3–ca (hco3)2–caco3

1. caco₃ + 2hcl = cacl₂ + co₂ + h₂o 2. cacl₂ + 2li = 2licl + ca 3. 2ca + o₂ = 2cao 4. cao + h₂o = ca(oh)₂ 5. ca(oh)₂ + h₂co₃ = caco₃ + 2h₂o 6. caco₃ + h₂co₃ = ca(hco₃)₂ 7. ca(hco₃)₂ + 2lioh = caco₃↓ + li₂co₃ + 2h₂o

2al + 3h2so4 = al2(so4)3 + 3h2

n(al2(so4)3) = m(al2(so4)3)/m(al2(so4)3) = 3,42/342 = 0,01 моль

по уравнению n(al) = 2*n(al2(so4)3) = 2*0,01 = 0,02 моль

m(al) = n(al)*m(al) = 0,02*27 = 0,54 г.

cuso4+2koh=сu(oh)2 + k2so4

cuso4+ba(oh)2=сu(oh)2 +baso4

cu(no3)2+ba(oh)2= сu(oh)2 + ba(no3)2

 

cu(2+)  + 2oh- = сu(oh)2

 

а,в,г.