Short Answer 
To balance chemical equations, first categorize each equation by its reaction type (e.g., synthesis, decomposition). Then, write unbalanced equations clearly and systematically balance them by ensuring equal atom counts on both sides and adjusting the coefficients accordingly.
Step 1: Identify the Reaction Types
First, categorize each chemical equation based on the type of reaction it represents. Understanding the type of reaction helps in the balancing process. Here are the primary types:
- Synthesis Reaction: Two or more substances combine to form a single product.
- Decomposition Reaction: A compound breaks down into simpler substances.
- Single Replacement Reaction: An element replaces another in a compound.
- Double Replacement Reaction: Components of two compounds swap places.
- Combustion Reaction: A substance combines with oxygen, often producing energy.
Step 2: Write the Unbalanced Equations
Next, list down all the chemical equations that need balancing. Ensure they are presented in a clear format to make the following steps easier. The unbalanced reactions include:
- 1. N2 + 3 H2 ‚ÄöUi 2 NH3
- 2. 2 KClO3 ‚ÄöUi 2 KCl + 3 O2
- 3. 2 NaF + ZnCl2 ‚ÄöUi ZnF2 + 2 NaCl
- 4. 2 AlBr3 + 3 Ca(OH)2 ‚ÄöUi Al2(OH)6 + 6 CaBr2
- 5. 2 H2 + O2 ‚ÄöUi 2 H2O
- 6. 2 AgNO3 + MgCl2 ‚ÄöUi 2 AgCl + Mg(NO3)2
- 7. 2 Al + 6 HCl ‚ÄöUi 2 AlCl3 + 3 H2
- 8. C3H8 + 5 O2 ‚ÄöUi 3 CO2 + 4 H2O
- 9. 2 FeCl3 + 6 NaOH ‚ÄöUi Fe2O3 + 6 NaCl + 3 H2O
- 10. 4 P + 5 O2 ‚ÄöUi 2 P2O5
- 11. 2 Na + 2 H2O ‚ÄöUi 2 NaOH + H2
- 12. 2 Ag2O ‚ÄöUi 4 Ag + O2
- 13. C6H12O6 + 6 O2 ‚ÄöUi 6 CO2 + 6 H2O
- 14. 2 KBr + MgCl2 ‚ÄöUi 2 KCl + MgBr2
- 15. 2 HNO3 + Ba(OH)2 ‚ÄöUi Ba(NO3)2 + 2 H2O
- 16. C5H12 + 8 O2 ‚ÄöUi 5 CO2 + 6 H2O
- 17. 4 Al + 3 O2 ‚ÄöUi 2 Al2O3
- 18. Fe2O3 + 2 Al ‚ÄöUi 2 Fe + Al2O3
Step 3: Balance the Chemical Equations
Finally, proceed to balance each equation systematically. This involves ensuring that the number of atoms of each element is equal on both sides of the equation. Follow these guidelines:
- Count the number of atoms for each element in the reactants and products.
- Adjust the coefficients (the numbers in front of compounds) to balance the equations without changing the chemical formulas.
- Check to make sure that the final equation is balanced for each element involved.
- Repeat the process for all listed reactions until they are correctly balanced.