An Introduction to the An Introduction to the Types of ReactionsTypes of Reactions

Science 10Science 10Chemistry UnitChemistry Unit

Your turn:Your turn:Write a word equation and a chemical equationWrite a word equation and a chemical equationfor the following problems.for the following problems. Be sure to:Be sure to: include the final equation include the final equation statesstates of matter of matter and and balancebalance

1.1. magnesium + oxygenmagnesium + oxygen2.2. hydrogen + oxygenhydrogen + oxygen3.3. nitrogen reacts with another element to nitrogen reacts with another element to

produce ammoniaproduce ammonia4.4. aluminum reacts with oxygenaluminum reacts with oxygen5.5. sulfur (Ssulfur (S88 (s)(s)) reacts with air to produce ) reacts with air to produce

sulfur dioxidesulfur dioxide6.6. carbon disulfide is produced by the carbon disulfide is produced by the

reaction of carbon with sulfur (Sreaction of carbon with sulfur (S88 (s)(s)) )

Problem 1:Problem 1:

Word Equation:Word Equation:

magnesium + oxygen →magnesium + oxygen → magnesium oxidemagnesium oxide

Chemical Equation:Chemical Equation:

Mg Mg (s) (s) + O+ O22 (g) (g) →→ Mg Mg22OO(s)(s)

Is it Balanced?Is it Balanced?

4 Mg 4 Mg (s) (s) + O+ O22 (g) (g) →→ 2 Mg 2 Mg22OO(s)(s)

Problem 2:Problem 2:

Word Equation:Word Equation:

hydrogen + oxygen →hydrogen + oxygen → waterwater

Chemical Equation:Chemical Equation:

HH22 (g) (g) + O+ O22 (g) (g) →→ H H22OO(l)(l)

Is it Balanced?Is it Balanced?

2 H2 H22 (g) (g) + O+ O22 (g) (g) →→ 2 H 2 H22OO(l)(l)

Problem 3:Problem 3: Nitrogen reacts with another element to produce Nitrogen reacts with another element to produce ammoniaammonia

Word Equation:Word Equation:nitrogen + hydrogen →nitrogen + hydrogen → ammoniaammonia

Chemical Equation:Chemical Equation:NN22 (g) (g) + H+ H22 (g) (g) →→ NH NH3 3 (l)(l)

Is it Balanced?Is it Balanced?NN22 (g) (g) + 3 H+ 3 H22 (g) (g) →→ 2 NH 2 NH3 3 (l)(l)

Problem 4:Problem 4:

Word Equation:Word Equation:

aluminum + oxygen →aluminum + oxygen → aluminum oxide aluminum oxide

Chemical Equation:Chemical Equation:

Al Al (s) (s) + O+ O22 (g) (g) →→ Al Al22OO3 (s)3 (s)

Is it Balanced?Is it Balanced?

4 Al 4 Al (s) (s) + 3 O+ 3 O22 (g) (g) →→ 2 Al 2 Al22OO3 (s)3 (s)

Problem 5:Problem 5:

Sulfur (SSulfur (S88 (s)(s)) reacts with air to produce sulfur dioxide) reacts with air to produce sulfur dioxide

Word Equation:Word Equation:sulphur + oxygen →sulphur + oxygen → sulphur dioxidesulphur dioxide

Chemical Equation:Chemical Equation:

SS88 (s) (s) + O+ O22 (g) (g) →→ SO SO2 (g)2 (g)

Is it Balanced?Is it Balanced?

SS88 (s) (s) + 8 O+ 8 O22 (g) (g) →→ 8 SO 8 SO2 (g)2 (g)

Problem 6:Problem 6: Carbon disulfide is produced by the reaction of carbon with sulfurCarbon disulfide is produced by the reaction of carbon with sulfur(S(S4 (s)4 (s)).).

Word Equation:Word Equation:carbon + sulphur →carbon + sulphur → waterwater

Chemical Equation:Chemical Equation:

C C (s) (s) + + SS4 (s)4 (s)→→ CS CS2 (s)2 (s)

Is it Balanced?Is it Balanced?

2 C 2 C (s) (s) + + SS4 (s)4 (s)→→ 2 CS 2 CS2 (s)2 (s)

1.1. nitrogen reacts with another element to produce nitrogen reacts with another element to produce ammoniaammonia

2.2. aluminum reacts with oxygenaluminum reacts with oxygen

3.3. sulfur (Ssulfur (S88 (s)(s)) reacts with air to produce sulfur dioxide) reacts with air to produce sulfur dioxide

4.4. Carbon disulfide is produced by the reaction of Carbon disulfide is produced by the reaction of carbon with sulfurcarbon with sulfur

Formation or Synthesis ReactionsFormation or Synthesis Reactions

1.1. ________Fe + ________O________Fe + ________O22 → ________Fe → ________Fe22OO33

2.2. ________Pt + ________S________Pt + ________S88 → ________PtS → ________PtS22

3.3. ________CaO + ________H________CaO + ________H22O → _______Ca(OH)O → _______Ca(OH)22

4.4. ________Na + ________I________Na + ________I22 → ________ → ________

5.5. ________Mg + ________O________Mg + ________O22 → ________ → ________

6.6. ________Mg + ________P________Mg + ________P4 4 → ________Mg → ________Mg33PP22

7.7. ________H________H22 + ________Cl + ________Cl22 → ________ → ________

8.8. ________CO + ________O________CO + ________O22 → ________CO → ________CO22

9.9. ________Na________Na22O + ________HO + ________H22O → ______NaOHO → ______NaOH

10.10. ________NO + ________O________NO + ________O22 → ________NO → ________NO22

11.11. ________Na + ____ S________Na + ____ S88 → ____ Na → ____ Na22SS

12.12. ________Mg + ________Cl________Mg + ________Cl22 → ______ MgCl → ______ MgCl22

13.13. ________P + ________O________P + ________O22 → ________P → ________P44OO1010

14.14. ________Cu + ________O________Cu + ________O2 2 → ________Cu→ ________Cu22OO

Your turn:Your turn:Write a word equation and a chemical equationWrite a word equation and a chemical equationfor the following problems.for the following problems. Be sure to:Be sure to: include include statesstates of matter of matter and and balancebalance the final equation the final equation

1.1. Decomposition of sodium chloride Decomposition of sodium chloride 2.2. Chromium (III) oxide is decomposed into its Chromium (III) oxide is decomposed into its

elements elements 3.3. Nitrogen is produced from the decomposition of Nitrogen is produced from the decomposition of

ammonia ammonia 4.4. Mercury (II) sulfide breaks down into its elements Mercury (II) sulfide breaks down into its elements 5.5. Decomposition of sodium hydroxide Decomposition of sodium hydroxide 6.6. Decomposition of potassium bromide Decomposition of potassium bromide 7.7. Decomposition of magnesium oxide Decomposition of magnesium oxide 8.8. Decomposition of ammonium sulphateDecomposition of ammonium sulphate

Problem 1:Problem 1:

Word Equation:Word Equation:

Sodium chloride Sodium chloride sodium + chlorine sodium + chlorine

Chemical Equation:Chemical Equation:NaCl NaCl (s)(s) Na Na (s)(s) + Cl + Cl2 (g)2 (g)

Is it Balanced?Is it Balanced?2 NaCl 2 NaCl (s)(s) 2 Na 2 Na (s)(s) + Cl + Cl2 (g)2 (g)

Problem 2:Problem 2: Word Equation:Word Equation:Chromium (III) oxide Chromium (III) oxide chromium + oxygen chromium + oxygen

Chemical Equation:Chemical Equation:CrCr22OO33 (s)(s) Cr Cr (s)(s) + O + O2 (g)2 (g)

Is it Balanced?Is it Balanced?2 Cr2 Cr22OO33 (s)(s) 4 Cr 4 Cr (s)(s) + 3 O + 3 O2 (g)2 (g)

Problem 3:Problem 3: Word Equation:Word Equation:ammonia ammonia nitrogen + hydrogen nitrogen + hydrogen

Chemical Equation:Chemical Equation:NHNH33 (l)(l) N N22 (g)(g) + H + H2 (g)2 (g)

Is it Balanced?Is it Balanced?2 NH2 NH33 (l)(l) N N22 (g)(g) + 3 H + 3 H2 (g)2 (g)

Problem 4:Problem 4: Word Equation:Word Equation:Mercury (II) sulfide Mercury (II) sulfide mercury + sulphur mercury + sulphur

Chemical Equation:Chemical Equation:HgS HgS (s)(s) Hg Hg (s)(s) + S + S4 (s)4 (s)

Is it Balanced?Is it Balanced?4 HgS 4 HgS (s)(s) 4 Hg 4 Hg (s)(s) + S + S4 (s)4 (s)

Or:Or:Word Equation:Word Equation:Mercury (II) sulfide Mercury (II) sulfide mercury + sulphur mercury + sulphur

Chemical Equation:Chemical Equation:HgS HgS (s)(s) Hg Hg (s)(s) + S + S8 (s)8 (s)

Is it Balanced?Is it Balanced?8 HgS 8 HgS (s)(s) 8 Hg 8 Hg (s)(s) + S + S8 (s)8 (s)

Problem 5:Problem 5:

Word Equation:Word Equation:sodium hydroxidesodium hydroxide → → sodium + hydrogen + oxygen sodium + hydrogen + oxygen

Chemical Equation:Chemical Equation:NaOH NaOH (s)(s) Na Na (s)(s) + H + H2 (g)2 (g)+ O+ O2 (g)2 (g)

Is it Balanced?Is it Balanced?2 NaOH 2 NaOH (s)(s) 2 Na 2 Na (s)(s) + H + H2 (g)2 (g)+ O+ O2 (g)2 (g)

Problem 6:Problem 6:

Word Equation:Word Equation:

potassium bromide potassium bromide →→ potassium + brominepotassium + bromine

Chemical Equation:Chemical Equation:KBr KBr (s)(s) K K (s)(s) + Br + Br2 (l)2 (l)

Is it Balanced?Is it Balanced?2 KBr 2 KBr (s)(s) 2 K 2 K (s)(s) + Br + Br2 (l)2 (l)

Problem 7:Problem 7:

Word Equation:Word Equation:

Magnesium oxide Magnesium oxide →→ magnesium + oxygenmagnesium + oxygen

Chemical Equation:Chemical Equation:MgO MgO (s)(s) Mg Mg (s)(s) + O + O2 (g)2 (g)

Is it Balanced?Is it Balanced?2 MgO 2 MgO (s)(s) 2 Mg 2 Mg (s)(s) + O + O2 (g)2 (g)

Problem 8:Problem 8:

Word Equation:Word Equation:Ammonium sulphate Ammonium sulphate →→ ammonia + hydrogen sulphateammonia + hydrogen sulphate

Chemical Equation:Chemical Equation:(NH(NH44))22SOSO44 (s)(s) NH NH33 (l)(l) + H + H22SOSO4 (l)4 (l)

Is it Balanced?Is it Balanced?(NH(NH44))22SOSO44 (s)(s) 2 NH 2 NH33 (l)(l) + H + H22SOSO4 (l)4 (l)

Decomposition Reactions (Handout)

11. ____ NH. ____ NH44OH → ____ NHOH → ____ NH33 + ____ H + ____ H22OO

22. ____ BaO → ____________ + ______________. ____ BaO → ____________ + ______________ 33. ____ NaCl → ____________ + ____________. ____ NaCl → ____________ + ____________ 44. ____ Zn(OH). ____ Zn(OH)22 → ____ ZnO + ____ H → ____ ZnO + ____ H22OO

55. ____ BaCO. ____ BaCO33 → ____ BaO + ____ CO → ____ BaO + ____ CO22

66. ____ NH. ____ NH44NONO33 → ____ N → ____ N22O + ____ HO + ____ H22OO

77. ____ Al. ____ Al22OO33 → ____________ + ____________ → ____________ + ____________

88. ____ KClO. ____ KClO33 → ____ KCl + ____ O → ____ KCl + ____ O22

99. ____ NaClO. ____ NaClO33 → ____ NaCl + ____ O → ____ NaCl + ____ O22

1010.____ NH.____ NH44NONO22 → ____ N → ____ N22 + ____ H + ____ H22OO