Chemistry Examples

Balance Al_2(SO_4)_3+KOH→Al(OH)_3+K_2SO_4
Al2(SO4)3+KOHAl(OH)3+K2SO4
Step 1
The law of conservation of mass states that matter cannot be created nor destroyed. There are no more or less atoms at the end of a chemical reaction than there were at the beginning. To balance a chemical equation, every element must have the same number of atoms on each side of the equation.
To balance a chemical equation:
1. Every element must have the same number of atoms on each side of the equation (law of conservation of mass).
2. Balancing the equation can be done only by adjusting the coefficients.
Step 2
Al is not a balanced element. To balance Al, multiply Al(OH)3 from the right side by 2.
Al2(SO4)3+KOH2Al(OH)3+K2SO4
Step 3
S is not a balanced element. To balance S, multiply K2SO4 from the right side by 3.
Al2(SO4)3+KOH2Al(OH)3+3K2SO4
Step 4
K is not a balanced element. To balance K, multiply KOH from the left side by 6.
Al2(SO4)3+6KOH2Al(OH)3+3K2SO4
Step 5
O is a balanced element because there is the same number of atoms of O in each side of the equation.
O is a balanced element
Step 6
H is a balanced element because there is the same number of atoms of H in each side of the equation.
H is a balanced element
Step 7
All elements have the same number of atoms in each side of the equation, which means that the law of conservation of mass is satisfied and the chemical equation is balanced.
Al2(SO4)3+6KOH2Al(OH)3+3K2SO4
Al2(SO4)3+KOHAl(OH)3+K2SO4
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