In the balancing of chemical reaction
FeCl₃ + MgO → Fe₂O₃ + MgCl₂
The coefficient of MgCl₂in the balanced equation is:

Question

Question

Answer 1

1) Chlorine on LHS = 3

Chlorine on RHS = 2

Balance the Cl

LHS 2 x 3 = RHS 3 × 2):

2FeCl₃ + MgO → Fe₂O₃ + 3MgCl₂

2) Pick Fe to balance next:

Fe on LHS = 2

Fe on RHS = 3

Fe is already balanced in this step

3) Pick Mg to balance next:

Multiply MgO by 3 on LHS

2FeCl₃ + 3MgO → Fe₂O₃ + 3MgCl₂