試題詳解

3. The following unbalanced reaction occurs in basic media:
Fe²⁺ + Cr₂O₇^2- → Fe³⁺ + Cr³⁺
The coefficient for water in the balanced equation is _______ and water appears on the _______ side of the equation.
(A) 14, left
(B) 14, right
(C) 7, right
(D) 7, left
(E) none of these