Предмет: Химия, автор: dilnazmalikova007

Сколько граммов NaOH в 400 мл 0,2 М раствора?​

Ответы

Автор ответа: galiyeva2003
1

Ответ:

n (NaOH) = 0,4(400 мл в литрах) * 0,2 = 0,08 моль

m (NaOH) = 0,08*(2+17) = 3/2 г.

n = Cm (молярная концентрация) * V

m = n * M

Объяснение:

galiyeva2003: 16 - молярная кислорода, 1 - молярная масса водорода
dilnazmalikova007: спасибо
dilnazmalikova007: Какова массовая доля соли при добавлении еще 5 граммов соли в 100 граммов 5% раствора?
dilnazmalikova007: помоги пж
dilnazmalikova007: Сколько граммов сахара и воды нужно, чтобы приготовить 487 граммов 10-процентного раствора сахара?
galiyeva2003: куда я отправлю решение?
galiyeva2003: так на клаве очень сложно изложить(
galiyeva2003: подробно
dilnazmalikova007: у меня в профиле есть
galiyeva2003: ок
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