Balanced chemical equation : It is defined as the number of atoms of each element present on the left side must be equal to the number of atoms of each element present on the right side in the chemical reaction.
The balanced chemical equation is,
By the stiochiometry, 1 mole of magnesium chloride react with the 2 moles of silver nitrate to give 1 mole of magnesium nitrate and 2 moles of silver chloride.
To balance chemical equations, first determine how many of each are on each side.
MgCl2 + AgNO3 = Mg(NO3)2 + AgCl
1 Mg 1 Mg 2 Cl 1 Cl 1 Ag 1 Ag 1 NO3 2 NO3
Next, we have to get the amounts of elements to equal each other on both sides. Since there are 2 Cl on the left side and 1 Cl on the right, I'm going to multiply the part on the right that has Cl by 2.
MgCl2 + AgNO3 = Mg(NO3)2 + 2AgCl
1 Mg 1 Mg 2 Cl 2 Cl 1 Ag 2 Ag 1 NO3 2 NO3
We are still unbalanced, since there are more Ag and NO3 on the right than the left. To get them to equal each other, I'm going to multiply the part with the Ag and NO3 on the left by 2.
MgCl2 + 2AgNO3 = Mg(NO3)2 + 2AgCl
1 Mg 1 Mg 2 Cl 2 Cl 2 Ag 2 Ag 2 NO3 2 NO3
Now the equation is balanced!
This is the website I often use to double check to make sure I've balanced correctly: http://www.webqc.org/balance.php
