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Консультация № 63760
22.11.2006, 20:02
0.00 руб.
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1
hello world!!!
Мне необходимо решить задачу:
Какой объем водорода, измеренный при нормальных условиях, потребуется для восстановления оксида меди(2), который получили прритермическом разложении гидроксида меди(2) массой 19,6г(ответ:4,48л).
Было бы неплохо, если бы вы помогли составит уравнения реакций и прокомментировали решение.
Заранее благодарен, ПХ.
Мне необходимо решить задачу:
Какой объем водорода, измеренный при нормальных условиях, потребуется для восстановления оксида меди(2), который получили прритермическом разложении гидроксида меди(2) массой 19,6г(ответ:4,48л).
Было бы неплохо, если бы вы помогли составит уравнения реакций и прокомментировали решение.
Заранее благодарен, ПХ.
Обсуждение
Неизвестный
22.11.2006, 20:43
общий
это ответ
Здравствуйте, Перл-Харбор!
Для начала пишем уравнение реакции получения CuO: Cu(OH)2 -> CuO + H2O
Зная количесво Cu(OH)2 = 19.6г определяем сколько это в молях: 19.6/(64+(16+1)*2)=0.2 моль
Поскольку в реакции получения CuO все коэффициенты равны единице, полученное количество оксида меди (2) будет тоже 0.2 моль.
Пишем уравнение реакции восстановления:
CuO + H2 -> Cu + H2O - тут тоже все коэффициенты равны единице, откуда следует, что количесво потребовавшегося водорода тоже будет 0.2 моль, что в свою очередь равно 4.48 литров при нормальных условиях.
Удачи!
Для начала пишем уравнение реакции получения CuO: Cu(OH)2 -> CuO + H2O
Зная количесво Cu(OH)2 = 19.6г определяем сколько это в молях: 19.6/(64+(16+1)*2)=0.2 моль
Поскольку в реакции получения CuO все коэффициенты равны единице, полученное количество оксида меди (2) будет тоже 0.2 моль.
Пишем уравнение реакции восстановления:
CuO + H2 -> Cu + H2O - тут тоже все коэффициенты равны единице, откуда следует, что количесво потребовавшегося водорода тоже будет 0.2 моль, что в свою очередь равно 4.48 литров при нормальных условиях.
Удачи!
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