Question

hoa tan hoan toan 16g fe2o3 bang 146g dung dich hcl

tinh nong do phan tram dung dich hcl da dung

Answer 1

ta có: n_Fe2O3= 16/ 160= 0,1( mol)

PTPU

Fe₂O₃+ 6HCl\(\rightarrow\) 2FeCl₃+ 3H₂O

0,1.........0,6.................................

\(\Rightarrow\) m_HCl= 0,6. 36,5= 21.9( g)

\(\Rightarrow\) C%_HCl= \(\dfrac{21,9}{146}\). 100%= 15%