Предмет: Химия, автор: Mazyuka

Обчисліть масову частку натрій хлору в розчині, отриману змінюванням 2,8г солі+а25,2г води

Ответы

Автор ответа: UmidGasanov

Найдем общую массу раствора:
m(р-ра)=m(H2O)+m(соли)=2,8 г+ 25,2 г= 28 г.
Отсюда, W(соли)=m(соли)*100%/m(р-ра)= 2,8 г*100%/28 г= 10%.
Ответ: массовая доля соли в растворе составляет 10%.

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