Предмет: Химия, автор: Wolfgirl2019

Решите четвёртое задание плиииз. СРОЧНО!!!

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Ответы

Автор ответа: klekanova2001

Ответ: Zn+2HCl=>ZnCl2+H2

m(р-ра HCl)=V(р-ра HCl) * плотность=200*1,08=216 г

m(в-ва HCl)=(m(р-ра HCl)*w(HCl)/100%=(216*16)/100=34,56г

n(HCl)=m(в-ва HCl)/M(HCl)=34,56/36,5=0,945 моль

n(Zn)=m(Zn)/M(Zn)=15,6/65=0,24 моль

HCl в избытке, значит подсчёты будем вести по Zn.

n(Zn)=n(H2)=0,24 моль

V(H2)=Vm*n(H2)=22,4 г/моль * 0,24=5,376 л

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