Предмет: Химия, автор: margaritaravilova12

ПОМОГИТЕ СРОЧНО ПОЖАЛУЙСТА
150 г, 33 процента
приготовить раствор
сколько воды и соли?

Ответы

Автор ответа: ishatohina07

Для решения данной задачи необходимо воспользоваться следующей формулой и составить пропорцию:

Где 100% весь раствор, масса которого равна 150 грамм, а 33% - это количество необходимой соли.

100%*150=33%*х.

w=m(вещества)*100%/m(раствора)
Выводим: m(вещества)=w*m(раствора)/100%

Поскольку нам нужно получить 150 грамм 33 процентного расствора, подставим данные в формулу:

m(вещества)=33%*150г/100%=49,5 г

Ответ
Для того чтобы получить 3% раствор нам необходимо взять 49,5 грамма соли.

Тогда все вещества в такой пропорции:
150г-49,5г=100,5 г воды

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