Предмет: Химия, автор: Fanta7778

Решите пожалуйста задачу по химии

Приложения:

Ответы

Автор ответа: Gwenchana
1

Ответ:

На фото.

Объяснение:

Приложения:
Автор ответа: dobriakua
1

Дано:

m(известняка) = 500 кг

ω(прим.) = 2%

Найти:

m(соли) - ?

Решение:

1) CaCO3 + 2HCl → CaCl2 + CO2↑ + H2O;

2) ω(CaCO3) = 100% - ω(прим.) = 100% - 2% = 98%;

3) m(CaCO3) = ω(CaCO3) * m(известняка) / 100% = 98% * 500 / 100% = 490 кг;

4) n(CaCO3) = m / M = 490 / 100 = 4,9 кмоль;

5) n(CaCl2) = n(CaCO3) = 4,9 кмоль;

6) m(CaCl2) = n * M = 4,9 * 111 = 543,9 кг.

Ответ: Масса CaCl2 составляет 543,9 кг.


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