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: (“–”)
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( . 7.2)
84
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85
2H+ + 2e H2,
= 298 :
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H – H+ ; |
p H 2 – , |
p H 2 = 2 10-5 . |
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H 2 |
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O2 + 2H2O + 4e 4OH ,
T = 298
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aOH |
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O2 OH = 1,23 + 0,0147 lg p O2 |
– 0,059 . |
( 0,21 ) p .
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z
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z |
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–
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= 7 – 12 lg + 12 lg ;
–,
= 7 – 12 lg + 12 lg .
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90