Answer:
A. 1,3,1,3
Explanation:
The coefficients 1,3,1,3 balance the equation.
1 FeCl3 + 3 NaOH –> 1 Fe(OH)3 + 3 NaCl
In this equation we know it is balanced.
Write down the type of element on both left hand and right hand sides.
Fe Fe
Cl Cl
Na Na
O O
H H
Write down the valency/amount of each atom
Fe= 1 Fe= 1
Cl= 3 Cl= 3
Na= 3 Na= 3
O= 3 O= 3
H= 3 H=3
Both sides, left and right have the same number of atoms. Therefore both sides are balanced.
