Вопрос школьника по предмету Химия
сколько потребуется раствора содержащего 0,05 массовых долей тлт 5 % хлороводорода для реакции с 11,2 г карбоната натрия
Ответ учителя по предмету Химия
Уравнение реакции:
2HCl+Na2CO3=2NaCl+CO2+H2O
Найдем массу HCl по уравнению реакции:
70*11.2/106=7.71 г.
70- молярная масса 2HCl
11.2-масса карбоната натрия
106-молярная масса карбоната натрия
Мы нашли массу чистого хлороводорода. Теперь найдем сколько составляет 100%:
7.71*100%/5%=154.2 грамма
Могу ошибаться!!!
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