Balancing Equations Practice Worksheet for chemistry students to practice balancing chemical equations.

Here are the balanced chemical equations for the worksheet. To balance them, we make sure the number of atoms for each element is the same on both the left (reactants) and right (products) sides.

1) $2\text{NaNO}_3 + \text{PbO} \rightarrow \text{Pb(NO}_3)_2 + \text{Na}_2\text{O}$
* Check:
* Na: 2 on left, 2 on right.
* N: 2 on left, 2 on right.
* O: $6 + 1 = 7$ on left, $6 + 1 = 7$ on right.
* Pb: 1 on left, 1 on right.

2) $6\text{AgI} + \text{Fe}_2(\text{CO}_3)_3 \rightarrow 2\text{FeI}_3 + 3\text{Ag}_2\text{CO}_3$
* Check:
* Ag: 6 on left, $3 \times 2 = 6$ on right.
* I: 6 on left, $2 \times 3 = 6$ on right.
* Fe: 2 on left, 2 on right.
* C: 3 on left, 3 on right.
* O: 9 on left, $3 \times 3 = 9$ on right.

3) $\text{C}_2\text{H}_4\text{O}_2 + 2\text{O}_2 \rightarrow 2\text{CO}_2 + 2\text{H}_2\text{O}$
* Check:
* C: 2 on left, 2 on right.
* H: 4 on left, $2 \times 2 = 4$ on right.
* O: $2 + 4 = 6$ on left, $4 + 2 = 6$ on right.

4) $\text{ZnSO}_4 + \text{Li}_2\text{CO}_3 \rightarrow \text{ZnCO}_3 + \text{Li}_2\text{SO}_4$
* Check: All atoms are already equal (1 of each compound unit). The coefficients are all 1.

5) $\text{V}_2\text{O}_5 + 5\text{CaS} \rightarrow 5\text{CaO} + \text{V}_2\text{S}_5$
* Check:
* V: 2 on left, 2 on right.
* O: 5 on left, 5 on right.
* Ca: 5 on left, 5 on right.
* S: 5 on left, 5 on right.

6) $\text{Mn(NO}_2)_2 + \text{BeCl}_2 \rightarrow \text{Be(NO}_2)_2 + \text{MnCl}_2$
* Check: This is a double replacement where everything swaps partners perfectly with a 1:1 ratio. All coefficients are 1.

7) $3\text{AgBr} + \text{GaPO}_4 \rightarrow \text{Ag}_3\text{PO}_4 + \text{GaBr}_3$
* Check:
* Ag: 3 on left, 3 on right.
* Br: 3 on left, 3 on right.
* Ga: 1 on left, 1 on right.
* P: 1 on left, 1 on right.
* O: 4 on left, 4 on right.

8) $3\text{H}_2\text{SO}_4 + 2\text{B(OH)}_3 \rightarrow \text{B}_2(\text{SO}_4)_3 + 6\text{H}_2\text{O}$
* Check:
* B: 2 on left, 2 on right.
* S: 3 on left, 3 on right.
* H: $6 + 6 = 12$ on left, $6 \times 2 = 12$ on right.
* O: $12 + 6 = 18$ on left, $12 + 6 = 18$ on right.

9) $\text{S}_8 + 8\text{O}_2 \rightarrow 8\text{SO}_2$
* Check:
* S: 8 on left, 8 on right.
* O: $8 \times 2 = 16$ on left, $8 \times 2 = 16$ on right.

10) $\text{Fe} + 2\text{AgNO}_3 \rightarrow \text{Fe(NO}_3)_2 + 2\text{Ag}$
* Check:
* Fe: 1 on left, 1 on right.
* Ag: 2 on left, 2 on right.
* N: 2 on left, 2 on right.
* O: 6 on left, 6 on right.

Final Answer:
1) 2, 1, 1, 1
2) 6, 1, 2, 3
3) 1, 2, 2, 2
4) 1, 1, 1, 1
5) 1, 5, 5, 1
6) 1, 1, 1, 1
7) 3, 1, 1, 1
8) 3, 2, 1, 6
9) 1, 8, 8
10) 1, 2, 1, 2