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Консультация № 201233
30.06.2021, 11:13
0.00 руб.
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Уважаемые эксперты! Пожалуйста, ответьте на вопрос:При восстановлении фосфора в качестве исходного сырья использовали 100 г фосфата кальция. В результате переработки выход фосфора составил 75% от теоретически возможного. Рассчитайте объем фосфина (н.у.), который можно получить при взаимодействии полученного фосфора со щелочью, если выход этой реакции составляет 80%?
Обсуждение
01.07.2021, 13:40
общий
это ответ
Здравствуйте, kuznetsova.79!
Предлагаю Вам следующее решение задачи.
Дано:
г -- масса фосфата кальция, использованного при восстановлении фосфора; 
-- выход фосфора в результате восстановления от теоретически возможного; 
-- выход фосфина, полученного при взаимодействии ранее восстановленного фосфора со щелочью.
Определить:
-- объём фосфина, полученного при взаимодействии ранее восстановленного фосфора со щелочью.
Вычислим относительную молекулярную массу фосфата кальция:
(г/моль).
В этой массе содержится
(г) фосфора. Значит, в г фосфата кальция содержится 
(г) фосфора. Выход восстановленного фосфора составил 
(г).
Чтобы рассчитать искомый объём фосфина, рассмотрим следующую реакцию:
В ходе этой реакции при взаимодействии
г фосфора со щелочью выделяется один моль фосфина, который при нормальных условиях занимает объём 
л. Значит, при взаимодействии 
г фосфора со щелочью при выходе, равном 
выделится
(л) фосфина.
Ответ:
л.
Предлагаю Вам следующее решение задачи.
Дано:
г -- масса фосфата кальция, использованного при восстановлении фосфора; -- выход фосфора в результате восстановления от теоретически возможного; -- выход фосфина, полученного при взаимодействии ранее восстановленного фосфора со щелочью.Определить:
-- объём фосфина, полученного при взаимодействии ранее восстановленного фосфора со щелочью.Решение
Вычислим относительную молекулярную массу фосфата кальция:
(г/моль).В этой массе содержится
(г) фосфора. Значит, в г фосфата кальция содержится (г) фосфора. Выход восстановленного фосфора составил (г).Чтобы рассчитать искомый объём фосфина, рассмотрим следующую реакцию:
В ходе этой реакции при взаимодействии
г фосфора со щелочью выделяется один моль фосфина, который при нормальных условиях занимает объём л. Значит, при взаимодействии г фосфора со щелочью при выходе, равном выделится (л) фосфина.Ответ:
л.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
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