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( !). 2-3 , . , . . . , , ( ). . 2 . :
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8-10 AlCl3, 2 NaOH . , : 2 HCl, - 2 NaOH. , , NaOH Na3[Al (OH)6]:
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2KIO3+5Na2SO3+H2SO4 = K2SO4+5Na2SO4+I2+H2O
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Na2S2O3+H2SO4=Na2SO4+SO2+S+H2O
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tg α =
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4
FeCl3 + 3KCNS = 3KCl + Fe(CNS)3
5 3 (III) (0,003 FeCl3 0,01 KCNS), 4 . . , 2-3 FeCl3, 3-4 KCNS, .
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: HCl, NaOH, NaCl, Na2CO3, ZnCl2, Pb (CH3COO)2. . ph . ph .
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3 FeCl3 ( , 1- ) Na2CO3 ( , , , 1- ) . . , . . :
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3-4 ZnCl2 . Na2CO3 . , . .
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3-4 ZnCl2 2 . , . . ZnCl2.
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1. .
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1-2 3 KI, 2-3 H2SO4 1-2 3 H2O2. ( ). .
2
1-2 3 KMnO4, 2-3 H2SO4 1-2 3 H2O2 . , , , .
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