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ó CaSO4∙2H2O CaSO4 , . CaSO4∙0,5H2O. , , , :
CaSO4∙0,5H2O + 1,5H2O = CaSO4∙2H2O
Na2SO4 . BaSO4 , .
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1. SO4 .
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1 BaCl2 ( Ba(NO3)2);
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) 1 Na2SO4;
1 BaCl2 ( Ba(NO3)2);
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S→FeS→H2S→SO2→Na2SO3→ Na2SO4→BaSO4.
3. H2SO4 80%, , 2 , . 40%.
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2. : NH4NO2, NH4NO3, (NH4)2SO4, NH4CL, (NH4)2HPO4, NH4H2PO4, (NH4)2CO3.
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1. , . Fe(SO4)3
Fe2O3 Fe FeSO4 á ñ Fe(OH)3
Fe(OH)2
2. 120. (3) ` 5,6 3 . ?
3. 20,4 . (2). , , 22,0.
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2u + O2 2CuO
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25 + CuO 3- + u + 2
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CuSO4 + 2KOH ¯Cu(OH)2¯ + K2SO4
CH2OH CH2 - O
½ ½ Cu
CHOH + Cu(OH)2¯ CH - O + 22
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