Вопрос школьника по предмету Химия
Обчисліть масу оцтової кислоти в 300г розчину з масовою часткою кислоти 6%
Ответ учителя по предмету Химия
Понятие 6% раствор означает, что в 100 г раствора содержится 6 г растворенного вещества, поэтому можем составить пропорцию:
100 г р-ра ————— 6 г в-ва
300 г р-ра ————— Х г в-ва
Х = 300*6/100 = 18 г
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