Science 10 Review

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Science 10 Review

• Part 4 Balancing Equations

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Study Guide p. 110
Balancing Chemical Equations

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Study Guide p. 110
Balancing Chemical Equations Count the number of
each atom on reactant and product side of
equation (multiply coefficient and
subscript).
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Study Guide p. 110
Balancing Chemical Equations
___Al(s) ___I2(g) ? ___AlI3(s)
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Study Guide p. 110
Balancing Chemical Equations
___Al(s) _3_I2(g) ? ___AlI3(s)
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Study Guide p. 110
Balancing Chemical Equations
___Al(s) _3_I2(g) ? _2_AlI3(s)
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Study Guide p. 110
Balancing Chemical Equations
_2_Al(s) _3_I2(g) ? _2_AlI3(s)
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Study Guide p. 110
Step 4 Always double check your answer.
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e.g. __Al(s) __ I2(g) ? __ AlI3(s)
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Products Al 2 I 6
Reactants Al 2 I 6
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Study Guide p. 110

• Helpful Hints
• Balance elements in elemental form (Fe, O2, S8,
  P4) last.

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Study Guide p. 110

• Helpful Hints
• Balance elements in elemental form (Fe, O2, S8,
  P4) last.
• Balance polyatomic ions (e.g. SO42-) as a group
  if they dont break apart.

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Study Guide p. 110

• Helpful Hints
• Balance elements in elemental form (Fe, O2, S8,
  P4) last.
• Balance polyatomic ions (e.g. SO42-) as a group
  if they dont break apart.
• Balance oxygen and hydrogen last.

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Example
__C8H18(s) __ O2(g) ? __ CO2(g) __ H2O(g)
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25 Oxygen
16 Oxygen 9 Oxygen 25 Oxygen