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H2SO4 + Ca(OH)2 ---> CaSO4 + 2H2O
2H+ + SO4 2- + C 2+ + 2OH- ---> Ca 2+ + SO4 2- + 2H2O
2H+ + 2OH- --->2H2O
2.
Zn + H2SO4--->ZnSO4 + H2
ZnCl2 + H2SO4--->ZnSO4 + 2HCl
Zn(OH)2 + H2SO4--->ZnSO4 + 2H2O
ZnCO3 + K2SO4--->ZnSO4 + K2CO3
Zn(OH)2 + Na2SO4--->ZnSO4 + 2NaOH
3.
masa cz:40+32+64=136g/mol
masa Ca: 40g
masa S:32g
masa O:64g
Ca:
40/136 x 100%=29,4%
S:
32/136 x 100%=23,5%
O:
64/136 x 100%=47,1%
H2SO4+Ca(OH)2->CaSO4+2H2O
2H(+) + SO4(2-) + Ca(2+) + 2OH(-) ->Ca(2+) + SO4(2-) + 2H2O
2H(+) + 2OH(-) ->2H2O/:2
H(+) + OH(-) ->H2O
z.2
1.Zn(OH)2+H2SO4->ZnSO4+2H2O
2.Zn+H2SO4->ZnSO4+H2
3.ZnO+H2SO4->ZnSO4+H2O
4.ZnO+SO3->ZnSO4
5.SO3+Zn(OH)2->ZnSO4+H2O
z.CaSO4=40u+32u+4*16u=136u
%Ca=40u/136u*100%
%Ca=29,4%
%S=32u/136u*100%
%S=23,5%
%O=64u/136u*100%
%O=47,1%