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Процессы, происходящие при погружении металла в раствор собственной соли

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  5. Витамины, растворимые в воде
  6. Все продукты реакции остаются в полученном растворе
  7. Гидролиз водных растворов ароматических диазосоединений.

Если металлическую пластинку опустить не в воду, а в раствор собственных ионов, может оказаться так, что общая концентрация ионов в растворе станет больше, чем та равновесная концентрация, о которой говорилось выше. Но концентрация ионов металла вблизи его поверхности будет стремиться к равновесной, и поэтому «избыточные» катионы, оказавшиеся вблизи металла, осаждаются на его поверхности (рис.2,б). При этом поверхность металла заряжается положительно, а раствор у поверхности – отрицательно.

 

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Рис. 2. Схема процессов, протекающих при погружении цинковой (а) и медной (б) пластинок в растворы собственных солей.

В обоих случаях на границе металл – раствор возникает двойной электрический слой,

 


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Процессы, происходящие при погружении металла в воду| Гальванический элемент Даниэля-Якоби

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