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Balancing Chemical Equations Warm-up and Tips

This guide helps you balance chemical equations by providing steps, tips, practice problems, and an example. Avoid common mistakes and master equation balancing effortlessly!

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Balancing Chemical Equations Warm-up and Tips

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  1. Balancing Equations Chemical Equations & Reactions

  2. WARMUP • Decide whether the following equations are “balanced” or not. Na + MgF2 2NaF + Mg Cu(NO3)2 + Na2CO3 CuCO3 + NaNO3 P4O10 (s) P4 (s) + 5O2 (g)

  3. Balancing Steps • Write the unbalanced formula equation. • Countatoms on each side. • Add coefficients to make #s equal. • Coefficient  subscript = # of atoms 4. Reduce coefficients to lowest possible ratio, if necessary. 5. Double check atom balance!!!

  4. Helpful Tips • Balance one element at a time. • Updateall atom counts after adding a coefficient. • If an element appears more than once per side, balance it last. • Balance polyatomic ions as single units. • “1 SO4” instead of “1 S” and “4 O” • Balance H atoms and O atomsafter atoms of all other elements have been balanced.

  5. Practice • NH4NO3 + Ba3(PO4)2 Ba(NO3)2 + (NH4)3PO4

  6. Practice • Aluminum acetate and magnesium sulfate react to form aluminum sulfate and magnesium acetate.

  7. Al + CuCl2 Cu + AlCl3 Al Cu Cl Balancing Example Aluminum and copper(II) chloride react to form copper and aluminum chloride. 2 3 3 2 2  1 1 1 1 2 3  2  6 3  6   3

  8. Avoid Most Common Mistakes • writing incorrect chemical formulas for reactants or products • trying to balance an equation by changing subscripts

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