Question of the Day Writing a chemical equation: Day 2 5-21 Solid aluminum reacts with oxygen gas to produce solid aluminum oxide (Al2O3). Equation = Day 2 5-21

FIRST: finish and hand in the handout from yesterday. Assignment FIRST: finish and hand in the handout from yesterday. SECOND: Review section 11.1 and complete #s 7-11 (for #s 9 and 11 complete part a only) on page 354

Question of the Day Writing a chemical equation: Day 3 5-22 Solid silver reacts with oxygen gas to produce solid silver oxide (Ag2O). Equation = Day 3 5-22

Types of Chemical Reactions Synthesis Reactions Types of Chemical Reactions Synthesis reaction – composition reaction – 2 or more substances combine to form a new compound A + B AB A and B = eles. Or cmpds. AB = cmpd. Example # 1: 2H2(g) + O2(g) 2H2O(g) A B AB

Types of Chemical Equations Synthesis Reactions A and B = eles. Or cmpds. AB = cmpd. Example # 2: 2H2SO3(aq) + O2(g) 2H2SO4(aq) A B AB Example # 3: CaO(s) + SO2(g) CaSO3(s) A B AB

Types of Chemical Equations Synthesis Reactions Examples: an element reacts with oxygen to form an oxide most metals react with halogens to form cmpds. oxides of active metals react with water to produce metal hydroxides certain metal oxides and nonmetal oxides react to form salts

Types of Chemical Equations Synthesis Reactions Synthesis reactions always have ... 1 product that must be a compound

Types of Chemical Equations Decompostion Reactions decomposition reaction – single compound undergoes a reaction that produces 2 or more simpler subs. – usually require addition of energy (heat or electricity) AB A + B A and B = eles. Or cmpds. AB = cmpd. Example: 2H2O(l) 2H2(g) + O2(g) electricity AB A B

Decompostion Reactions Types of Chemical Equations Examples: electric current to a binary compound producing its elements Great example = ____________ electrolysis Basically the opposite of synthesis rxns.

Types of Chemical Equations Decompostion Reactions Electrolysis – decpomposition of a substance by an electrical current

Types of Chemical Equations Decompostion Reactions Decomposition reactions always have ... 1 reactant that must be a compound

 MAKE SURE you hand in before you leave!!! Assignment From yesterday: Review section 11.1 and complete #s 7-11 (for #s 9 and 11 complete part a only) on page 354  MAKE SURE you hand in before you leave!!!

NaCl(s) + F2(g)  NaF(s) + Cl2(g Day 4 5-26 Q Of The Day Balance the following chemical reaction AND answer the questions below: NaCl(s) + F2(g)  NaF(s) + Cl2(g a. sodium chloride = what state of matter b. What is produced (BOTH!)?

Practice Use the following chemical reaction to answer the questions below: 2Al2S3(aq) 4Al(s) + 3S2(g) a. aluminum sulfide = what state of matter b. What does the 3 in front of sulfur tell you? c. What is produced (BOTH!)? electricity

Review What is a synthesis reaction? What is a decomposition reaction?

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

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 ***

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

Review single replacement synthesis synthesis decomposition X + BY  Y + BX reaction type = _______________________ X + BY  BYX X + Y  XY BY  Y + B single replacement synthesis synthesis decomposition

Day 5 5-27 Q Of The Day Balance each of the following chemical reactions AND explain what type of reaction it is: a. NaHCO3(s) Na2CO3(s) + H2O(l) + CO2(g) b. F2(g) + AlCl3(s)  AlF3(aq) + Cl2(g) 2 heat decomposition 3 2 2 3 single replacement

Go to wiki and click links – shssci.wikispaces.com: http://education.jlab.org/elementbalancing/index.html (7 questions at beginner and 7 at intermediate in 12 tries each) http://www.sciencegeek.net/Chemistry/taters/EquationBalancing.htm - bonus

Question of the Day What happens during a … synthesis reaction decomposition reaction single replacement reaction

Go to wiki and click links – shssci.wikispaces.com: http://education.jlab.org/elementbalancing/index.html (10 questions at beginner and 10 at intermediate in 15 tries each) http://www.sciencegeek.net/Chemistry/taters/EquationBalancing.htm - bonus

http://education.jlab.org/elementbalancing/index.html http://www.files.chem.vt.edu/RVGS/ACT/notes/scripts/bal_eq1.html http://www.sciencegeek.net/Chemistry/taters/EquationBalancing.htm - bonus