Question

[nin nguyen]

cho 6 5 gam kem tac dung vua du voi dung dich hydrochloric acid HCL thi thu duoc dung dich zinc chloride ZnCl2 va khi hydrogen thoat ra A viet PTHH B tinh khoi luong hydrochloric acid HCL tham gia phan ung C tinh khoi luong zinc chloride ZnCl2 tao thanh D tinh the tich khi hydrogen thoat ra o dieu kien chuan 25 do C 1 bar

Cho Zn=65 H=1 Cl= 35.5

Answer 1

[Lihnn_xj]

\(n_{Zn}=\dfrac{6,5}{65}=0,1mol\)

PTHH: Zn + 2HCl \(\rightarrow\) ZnCl₂ + H₂

          0,1      0,2        0,1       0,1     ( mol )

\(m_{HCl}=0,2.\left(1+35,5\right)=7,3g\)

\(m_{ZnCl_2}=0,1.136=13,6g\)

\(V_{H_2}\left(đkc\right)=0,1.24,79=2,749l\)