Question

Hoa tan kL Zn vao dd Hcl thu dc 2,24 lit khi ( dktc) . Khoi luong kem tham Gia phan ung la

Answer 1

Zn + 2HCl ==> ZnCl2 + H2

0,1....................................0,1 (mol)

=> mZn = 6,5 g

Answer 2

PTHH : Zn + 2HCl --- > ZnCl₂ + H₂

n_H2 = \(\dfrac{2,24}{22,4}=0,1\)

Theo PTPU ta có : n_Zn = n_H2 = 0,1 mol

=> m_Zn = 0,1 . 65 = 6,5 (g)