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Balancing Equations

Balancing Equations. Balancing Equations Notes…27. Equations must be balanced because matter can’t be created or destroyed- Law of Conservation of Mass Must have equal numbers of atoms of each element on both sides When balancing equations you may only add a coefficient .

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Balancing Equations

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  1. Balancing Equations

  2. Balancing Equations Notes…27 Equations must be balanced because matter can’t be created or destroyed- Law of Conservation of Mass Must have equal numbers of atoms of each element on both sides When balancing equations you may only add a coefficient. You may NOT change a subscript! (this will change the compound)

  3. 3H20 Subscript Coefficient

  4. NaNO3 Na: N: O: 2NaNO3 Na: N: O:

  5. MgPO3 Mg: P: O: 6MgPO3 Mg: P: O:

  6. Ex. 1: Na + I2 NaI + Na I Na I I I Na Na

  7. Ex. 2: K2O + H2O KOH K K K H H O H + O K O H O

  8. Ex. 3: Mg + HCl MgCl2 + H2 H Cl Mg + H Cl Mg + H H Cl Cl

  9. Ex. 4: S + O2 SO3 O + O S S O O O

  10. Ex. 5: CH4 + O2 CO2 + H2O Hint: Fix the hydrogen's first!

  11. Ex. 6 S= S= O= O=

  12. Ex. 7 H= H= N= N=

  13. Ex. 8 Al= Al= O= O=

  14. Ex. 9 P= P= O= O=

  15. Ex. 10 Al= Al= Br= Br=

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