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Консультация № 144842
24.09.2008, 07:38
0.00 руб.
0
1
1
Помогитерешитьзадачу.
При выпаривании раствора сульфата меди (II) массой 80 г образовался сухой остаток массой 8 г. Определите объём раствора концентрацией 0.5 моль/л, который можно было бы из него получить.
При выпаривании раствора сульфата меди (II) массой 80 г образовался сухой остаток массой 8 г. Определите объём раствора концентрацией 0.5 моль/л, который можно было бы из него получить.
Обсуждение
24.09.2008, 08:54
общий
это ответ
Здравствуйте, Алексеев Илья Юрьевич!
Результат может отличаться, в зависимости от того, как сильно грели при выпаривании (при небольшой температуре выделяется кристаллогидрат, при перегреве он разлагается).
Вероятно (т.к. не сказано свидетелбствующее об обратном), формула осадка CuSO4*5H2O (медный купорос, молярная масса 250 г/моль)
количество вещества 8/250=0,032моль
объём раствора 0,032/0,5=0,064л=64мл
Результат может отличаться, в зависимости от того, как сильно грели при выпаривании (при небольшой температуре выделяется кристаллогидрат, при перегреве он разлагается).
Вероятно (т.к. не сказано свидетелбствующее об обратном), формула осадка CuSO4*5H2O (медный купорос, молярная масса 250 г/моль)
количество вещества 8/250=0,032моль
объём раствора 0,032/0,5=0,064л=64мл
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