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Balancing Equations

Balancing Equations. Chemical Reaction. A chemical reaction is the process by which atoms of one or more substances are rearranged to form different substances. Reactant(s). Reactant(s) are the starting substance(s) of a reaction Reactant(s) are on the left. Product(s).

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Balancing Equations

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  1. Balancing Equations

  2. Chemical Reaction • A chemical reaction is the process by which atoms of one or more substances are rearranged to form different substances.

  3. Reactant(s) • Reactant(s) are the starting substance(s) of a reaction • Reactant(s) are on the left

  4. Product(s) • Product(s) are the substance(s) formed during the reaction • Product(s) are on the right

  5. Balanced Chemical Equation • The equation that shows the number of atoms of each reactant and each product is equal on both sides of the arrow is a balanced chemical equation • Example 2Fe(s) + 3Cl2(g)  2FeCl3(s) Reactants  Products

  6. Step 1 • List the atoms present for the reactants • List the atoms present for the products • List in this order: • metals • non-metals • hydrogen • oxygen last **Make sure both lists are in the same order! met a non hairy oxen?

  7. Step 2 • Total atoms on the reactant side • Total atoms on the product side **Combine like atoms on the same side of the reaction

  8. Step 3 • Balance an element by placing a coefficient in front of the chemical formula **Select coefficients that will give the same number of atoms on each side of the equation.

  9. Step 4 • Adjust atom totals for all atoms affected by the addition of your coefficient **Other elements may have become unbalanced.

  10. Step 5 • Continue to add coefficients and make adjustments until all elements are balanced

  11. Helpful Hints • If you have an odd number of oxygen atoms, multiply the coefficient by 2 first to make it an even number. Then try to balance the equation. • If you end up with an odd total of a diatomic element, try doubling all coefficients in the reaction to balance out the diatomic.

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