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To learn to write a balanced equation for a chemical reaction

Objectives. To learn to write a balanced equation for a chemical reaction . A chemical reaction is balanced by using a systematic approach: . Write the formulas of the reactants and products to give the unbalanced chemical equation.

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To learn to write a balanced equation for a chemical reaction

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  1. Objectives • To learn to write a balanced equation for a chemical reaction

  2. A chemical reaction is balanced by using a systematic approach: • Write the formulas of the reactants and products to give the unbalanced chemical equation. • Balance by trial and error starting with the most complicated molecule(s). • At the end check to be sure the equation is balanced (same numbers of all types of atoms on the reactant and product sides).

  3. Example:  • Hydrogen gas and oxygen gas combine to form liquid water. • Write the formulas of the reactants and products to give the unbalanced chemical equation. H2(g) + O2(g) H2O(l)

  4. Example:  • Hydrogen gas and oxygen gas combine to form liquid water. • Balance by trial and error starting with the most complicated molecule(s).

  5. Example:  • Hydrogen gas and oxygen gas combine to form liquid water. • At the end check to be sure the equation is balanced (same numbers of all types of atoms on the reactant and product sides). 2H2(g) + O2(g) 2H2O(l)

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