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Консультация № 176531
06.02.2010, 16:31
0.00 руб.
0
1
1
Здравствуйте уважаемые эксперты, прошу помочь в решении задачи:
2.24(1) Концентрация растворимого соединения Алюминия в сточной воде составляет 0,5 моль/л. Во сколько раз необходимо разбавить эту воду, чтобы можно было сливать её в канализацию, если известна ПДК соединения Алюминия 0,5 мг/л.
2.24(1) Концентрация растворимого соединения Алюминия в сточной воде составляет 0,5 моль/л. Во сколько раз необходимо разбавить эту воду, чтобы можно было сливать её в канализацию, если известна ПДК соединения Алюминия 0,5 мг/л.
Обсуждение
Неизвестный
06.02.2010, 18:05
общий
это ответ
Здравствуйте, kot31.
Переводим концентрацию алюминия в мг/л, исходя из предположения, что "растворимое соединение алюминия" содержит один атом алюминия на одну молекулу соединения(иначе задача теряет смысл, либо тогда надо было сказать, что концентрация соединения не 0.5 моль/л, а 0.5 моль*экв/л). Тогда в 1 л воды имеем 0.5 моль * 27000 мг/моль = 13500 мг алюминия. Чтобы получить раствор с концентрацией 0.5 мг/л, его надо разбавить в 13500/0.5 = 27000 раз.
Ответ: в 27000 раз.
С уважением, Товарищ Бородин
Переводим концентрацию алюминия в мг/л, исходя из предположения, что "растворимое соединение алюминия" содержит один атом алюминия на одну молекулу соединения(иначе задача теряет смысл, либо тогда надо было сказать, что концентрация соединения не 0.5 моль/л, а 0.5 моль*экв/л). Тогда в 1 л воды имеем 0.5 моль * 27000 мг/моль = 13500 мг алюминия. Чтобы получить раствор с концентрацией 0.5 мг/л, его надо разбавить в 13500/0.5 = 27000 раз.
Ответ: в 27000 раз.
С уважением, Товарищ Бородин
5
Спасибо!
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