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Question of the Day

Question of the Day. Day 4 9-17. Write the balanced chem. equation. Sulfuric acid and sodium hydroxide react to produce sodium sulfate and water. Objectives / Essential Questions. Day 4 9-17. 1. How do I use an equation to represent a chemical reaction?

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Question of the Day

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  1. Question of the Day Day 4 9-17 Write the balanced chem. equation Sulfuric acid andsodium hydroxide react to produce sodium sulfate and water.

  2. Objectives / Essential Questions Day 4 9-17 1. How do I use an equation to represent a chemical reaction? 2. How do I classify different types of rxns.?

  3. Unit 1 Test Day 3 9-14 Tentatively Day 3 9-24 for pd 1 Tentatively Day 2 9-21 for pd 3 BOTH PERIODS

  4. Types of Chemical Equations Single-Replacement Reactions Single-replacement reaction OR displacement reaction – one element replaces a similar element in a compound. A + BX AX + B Y + BX BY + X A, B, X, and Y = eles.; AX, BX, and BY = cmpds. Example: Fe(s) + CuSO4(aq) FeSO4(aq) + Cu(s) A BX AX B

  5. Types of Chemical Equations Single-replacement Reactions • Examples: • a metal with another metal • H in water with a metal • H in an acid with a metal • Halogens ***

  6. Types of Chemical Equations Single-replacement Reactions Single replacement reactions always have ... 2 reactants and 2 products 1 of each is an element

  7. Types of Chemical Equations Double-replacement Reactions Double-replacement reactions – the ions of 2 cmpds. exchange places in an aqueous sltn. to form 2 new cmpds. AX + BY AY + BX - - + - + - + + A, B, X, and Y = ions Example: 2KI(aq) + Pb(NO3)2(aq) PbI2(s) + 2KNO3(aq) AX BY BX AY

  8. Types of Chemical Equations Double-replacement Reactions Double replacement reactions always have ... 2 reactants and 2 products - all compounds In the margin: double reps. can form precipitates most acid-base reactions

  9. Practice What type of reaction is: AX + BY → AY + BX compound compound compound compound

  10. Practice What type of reaction is: X + BY → Y + BX element element compound compound

  11. Practice What type of reaction is: X + BY → BYX element compound compound

  12. Practice What type of reaction is: X + Y → XY element compound element

  13. Practice What type of reaction is: BY → Y + B element compound element

  14. Practice What type of reaction is: H2(g) + F2(g) 2HF(g)

  15. Practice What type of reaction is: 2 2 NaBr + Cl2 NaCl + Br2

  16. Practice What type of reaction is: 2KI + Pb(NO3)2 PbI2 + 2KNO3

  17. Practice What type of reaction is: 2H2O(l) 2H2(g) + O2(g) electricity

  18. Practice What type of reaction requires aqueous reactants? What type of reaction requires addition of heat and/or electricity? Describe some examples?

  19. Types of Chemical Equations Combustion Reactions Combustion reactions – a substance combines with oxygen, releasing a large amount of energy (light or heat) Unique equations Examples: Hydrogen gas: 2H2(g) + O2(g) 2H2O(g) Propane: C3H8(g) + 5O2(g) 3CO2(g) + 4H2O(g)

  20. Assignment Handout

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