Warm up 11-10-151. Why do we have to balance chemical equations?2. Balance these chemical equations:a) Sb + O2 → Sb4O6

b) FeCl3 + KF → KCl + FeF3

c) HCl + CaCO3 → H2O + CO2 + CaCl2

Agenda-Turn in Lab -Notes Unit 5-3-One-on-One grade check-WS Practice Unit 5-3

HomeworkDec 9 - Deadline for quiz retake

a) Sb + O2 → Sb4O6

b) FeCl3 + KF → KCl + FeF3

c) HCl + CaCO3 → H2O + CO2 + CaCl2

Unit 5-3

Types of Chemical Reactions

Types of Chemical Reactions

• Synthesis or CombinationA + B → AB

Ex: 2Na(s) + Cl2 (g) → 2NaCl (s)

The love story

Types of Chemical Reactions

• DecompositionAB → A + B

Ex: 2H2O → 2H2 + O2

The break-up

Types of Chemical Reactions

• Single Replacement or Single DisplacementAX + B → BX + A

Ex: CuSO4 + Zn(s) → ZnSO4 + Cu(s)

The complication

Types of Chemical Reactions

• Double Replacement or Double DisplacementAB + CD → CB + AD

Ex: Pb(NO3)2 + 2KI → PbI2 + 2KNO3

Types of Chemical Reactions

• CombustionCarbon compound + O2 → CO2 + H2O

Ex: CH4 + 2O2 → CO2 + 2H2O

Check In

• Name the reaction type for the following equations:

• NH3+ H2SO4 → (NH4)2SO4

• HgO → Hg + O2

• CH4 + O2 → H2O + CO2

• CuCl2 + H2S → CuS + HCl

• BaCl2 + Na2SO4 → NaCl + BaSO4

SynthesisDecompositionCombustionDouble Replace.Double Replace.

Percent Yield

• Analysis of the efficiency for chemical reaction• Percent Yield calculation

Percent Yield• Theoretical yield – The maximum amount of products that can be

formed in a reaction based on calculation

Percent Yield

• The actual yield – Real amount produced in a reaction (usually less

than the expected theoretical yield).

Percent YieldExample• A reaction should have produced 1.44g of

MgO. After the experiment, only 1.23g of magnesium oxide was present. What is the percent yield?

Assignments

• Summary• Practice Worksheet due next class• One-on-One grade check