Worksheet: Balancing Chemical Equations with Models

Instructions: Use the pictures and colors provided to balance the chemical equations below. Draw the appropriate number of molecules or atoms on each side of the equation to ensure it is balanced.

Example 1: __H2 + __O2 → __H2O

Example 2: __Na + __Cl2 → __NaCl

Example 3: __Fe + __O2 → __Fe2O3

Example 4: __C3H8 + __O2 → __CO2 + __H2O

Example 5: __Al + __O2 → __Al2O3

Example 6: __CaO + __H2O → __Ca(OH)2

Example 7: __NH3 + __O2 → __NO + __H2O

Example 8: __C6H12O6 + __O2 → __CO2 + __H2O

Example 9: __Mg + __HCl → __MgCl2 + __H2

Example 10: __C4H10 + __O2 → __CO2 + __H2O

Color Key: - Hydrogen (H): Blue - Oxygen (O): Red - Sodium (Na): Yellow - Chlorine (Cl): Green - Iron (Fe): Brown - Carbon (C): Black - Aluminum (Al): Gray - Calcium (Ca): Orange - Nitrogen (N): Purple - Magnesium (Mg): Pink

Note: The numbers in front of the elements or compounds represent the coefficients needed to balance the equation.