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

3h2 + n2 = 2nh3

2nh3 + h3po4 = (nh4)2hpo4

 

(nh4)2hpo4 + cacl2 = 2nh4cl + cahpo4

2nh4+ + hpo4(2-) + ca2+ + 2cl- = 2nh4+ + 2cl- + cahpo4

hpo4(2-) + ca2+ = cahpo4

 

nh4cl + agno3 = agcl + nh4no3

nh4+ + cl- + ag+ + no3- = agcl + nh4+ + no3-

cl- + ag+ = agcl

1)m(h2so4)=98 гр/моль m=98*0.3= 29.4 гр

2)

m=6.72*32/22.4=9.6 гр3)

8,8/44=0,2 моль => 0.2*6.02*10^23=1.204*10^23

4) 60 гр соли и 140 гр воды

5)m(al2o3)=102 гр/мольw=2*27/102*100%=53%