Предмет: Химия, автор: ArnoldGes

В 200 г 20% - ного раствора сульфата меди (II) погрузили железную пластину массой 16,8 г. Какая масса меди выделится на пластине? Какое количество железа не прореагирует?

Ответы

Автор ответа: Sergey72525
0

Ответ:

Объяснение:

Для решения этой задачи, нам потребуется узнать массу сульфата меди (II) в растворе и затем использовать соотношение между реагентами для определения массы меди и железа.

1. Вычислим массу сульфата меди (II) в растворе:

Масса раствора: 200 г

Концентрация сульфата меди (II): 20%

Масса сульфата меди (II) = масса раствора * концентрация сульфата меди (II)

Масса сульфата меди (II) = 200 г * (20/100) = 40 г

Таким образом, в растворе содержится 40 г сульфата меди (II).

2. Определим массу меди, которая выделится на железной пластине. Реакция между сульфатом меди (II) и железом имеет следующий химический баланс:

CuSO4 + Fe → FeSO4 + Cu

Мольное соотношение: 1:1

Молярная масса CuSO4 = 63.55 г/моль

Таким образом, масса Cu = масса CuSO4 = 40 г.

3. Найдем количество железа, которое не прореагирует. Масса железной пластины равна 16.8 г, но она реагирует только с медью, а не с сульфатом меди (II).

Масса железа, которая не прореагирует = масса железной пластины - масса меди

Масса железа, которая не прореагирует = 16.8 г - 40 г = -23.2 г

Отрицательное значение означает, что в данном случае медь будет полностью реагировать с железом, и никакого избыточного железа не останется.

Таким образом, масса меди, выделяющейся на пластине, составляет 40 г, а количество железа, которое не прореагирует, равно 0 г.

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