Chapter 6Chemical Reactions: An Introduction

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Chapter 6Chemical Reactions An Introduction

• Evidence for Chemical Reaction
• Writing Chemical Equations
• Balancing Chemical Equations

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Example 1

• KOH(aq) H2S(aq) ? K2S(aq) H2O(l)

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Example 2

• HNO2(aq) ? N2O3(g) H2O(aq)

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Example 3

• NaOH(aq) H2SO4(aq) ? Na2SO4(aq) H2O(l)

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Example 4

• (NH4)2S(aq) Pb(NO3)2(aq) ? PbS(s) NH4NO3(aq)

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Example 5

• Al(s) O2(g) ? Al2O3(s)

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Example 6

• Fe2O3(s) C(s) ? Fe(s) CO2(g)

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Example 7

• C4H10(g) O2(g) ? CO2(g) H2O(l)

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Example 8

• An aqueous solution of silver nitrate
• reacts with an aqueous solution of lead
• (II) chloride to produce silver chloride
• solid and aqueous lead (II) nitrate.
• Write a balanced chemical equation for
• this reaction.

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Example 9

• When aqueous phosphoric acid reacts
• with aqueous strontium hydroxide,
• water and a solution of strontium
• phosphate are produced. Write a
• balanced chemical equation for this
• reaction.

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Summary of All Examples

• KOH(aq) H2S(aq) ? K2S(aq) H2O(l)
• HNO2(aq) ? N2O3(g) H2O(l)
• NaOH(aq) H2SO4(aq) ? Na2SO4(aq) H2O(l)
• (NH4)2S(aq) Pb(NO3)2(aq) ? PbS(s) NH4NO3(aq)
• Al(s) O2(g) ? Al2O3(s)
• Fe2O3(s) C(s) ? Fe(s) CO2(g)
• C4H10(g) O2(g) ? CO2(g) H2O(l)
• An aqueous solution of silver nitrate reacts with
  an aqueous solution of lead (II) chloride to
  produce silver chloride solid and aqueous lead
  (II) nitrate. Write a balanced chemical equation
  for this reaction.
• When aqueous phosphoric acid reacts with aqueous
  strontium hydroxide, water and a solution of
  strontium phosphate are produced. Write a
  balanced chemical equation for this reaction.