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Консультация № 200698
22.04.2021, 14:39
0.00 руб.
0
2
2
Здравствуйте! У меня возникли сложности с таким вопросом: рассчитать массу хлорида натрия и объём воды необходимые для приготовления раствора массой 150 г. с массовой долей NaCl равной 8,47%
Обсуждение
22.04.2021, 16:58
общий
это ответ
Здравствуйте, lysenkonadezda38!
Предлагаю Вам следующее решение задачи.
Дано:
г -- масса раствора; 
-- массовая доля хлорида натрия в растворе.
Определить:
-- массу хлорида натрия, необходимую для приготовления раствора; 
-- объём воды, необходимый для приготовления раствора.
Массовая доля хлорида натрия в растворе равна отношению массы хлорида натрия к массе раствора, то есть
Поэтому
(г).
При этом масса воды в растворе составит
(г), а её объём, необходимый для приготовления раствора (если принять её плотность равной 
г/см3), -- 
(см3).
Ответ:
г; 
см3.
Предлагаю Вам следующее решение задачи.
Дано:
г -- масса раствора; -- массовая доля хлорида натрия в растворе.Определить:
-- массу хлорида натрия, необходимую для приготовления раствора; -- объём воды, необходимый для приготовления раствора.Решение
Массовая доля хлорида натрия в растворе равна отношению массы хлорида натрия к массе раствора, то есть
Поэтому (г).При этом масса воды в растворе составит
(г), а её объём, необходимый для приготовления раствора (если принять её плотность равной г/см3), -- (см3).Ответ:
г; см3.
5
Об авторе:
Facta loquuntur.
Facta loquuntur.
г
(г)
(г)
(мл)
г, 
мл
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