Предмет: Химия, автор: Olexandra13

Яку масу 25% розчину хлоридної кислоти треба витратити на розчинення магнію,що має масу 6г?

Ответы

Автор ответа: mrvladimir2

6 г х г
Mg + 2HCl = MgCl2 + H2
1 2 моль
моль 36,5 г/моль
24 г 73 г
х=m(HCl) = 6*73/24=18.25 г
m(p-pa HCl) = 18.25 г/0,25 = 73 г
Відповідь: 73 г

Автор ответа: mrvladimir2

під Mg 1 моль

Автор ответа: mrvladimir2

під HCl 2 моль 36,5 г/моль 73 г

Автор ответа: Olexandra13

а 24 г це що?

Автор ответа: mrvladimir2

Це молярна маса магнію помножена на кількість == 24 г/моль*1 моль = 24 г

Автор ответа: mrvladimir2

24 г під магнієм

Автор ответа: Nast9nka

6г ? г
Mg+2HCl=MgCl₂+H₂
1моль 2моль
36,5 г/моль
M(Mg)-24г
M(2HCl)-73г
m(HCl)=6г*73г/24г=18.25г
m(p-pa HCl)=18,25 г/0,25=73г
Ответ: 73г.

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