Please get out your homework! Chemistry Week 22 Please get out your homework!

February 13, 2013 AGENDA: 1 – Bell Ringer & Agenda 2 – Check Homework Today’s Goal: Students will be able to describe types of reactions. Homework Complete Classwork – due tomorrow Complete Homework – due by Friday Week 21 Work is due by this Friday at the latest!! If you missed Monday’s Quiz, please discuss with me a time to make it up. AGENDA: 1 – Bell Ringer & Agenda 2 – Check Homework 2 – Cornell Notes: Types of Reactions 3 – “We Do” Practice 4 – “You Do” Practice

Wednesday, February 13 Objective: Bell Ringer: Students will be able to describe types of reactions. Bell Ringer: Balance the following chemical reaction: ___ Zn + ___AgNO3  ____Ag + ___Zn(NO3)2 Zn = Zn = Ag = Ag = NO3 = NO3 =

2 MINUTES REMAINING…

Wednesday, February 13 Objective: Bell Ringer: Students will be able to describe types of reactions. Bell Ringer: Balance the following chemical reaction: ___ Zn + ___AgNO3  ____Ag + ___Zn(NO3)2 Zn = Zn = Ag = Ag = NO3 = NO3 =

1 MINUTES REMAINING…

Wednesday, February 13 Objective: Bell Ringer: Students will be able to describe types of reactions. Bell Ringer: Balance the following chemical reaction: ___ Zn + ___AgNO3  ____Ag + ___Zn(NO3)2 Zn = Zn = Ag = Ag = NO3 = NO3 =

30 seconds Remaining…

Wednesday, February 13 Objective: Bell Ringer: Students will be able to describe types of reactions. Bell Ringer: Balance the following chemical reaction: ___ Zn + ___AgNO3  ____Ag + ___Zn(NO3)2 Zn = Zn = Ag = Ag = NO3 = NO3 =

10 seconds Remaining…

BELL-RINGER TIME IS UP!

February 13, 2013 AGENDA: 1 – Bell Ringer & Agenda 2 – Check Homework Today’s Goal: Students will be able to describe types of reactions. Homework Complete Classwork – due tomorrow Complete Homework – due by Friday Week 21 Work is due by this Friday at the latest!! If you missed Monday’s Quiz, please discuss with me a time to make it up. AGENDA: 1 – Bell Ringer & Agenda 2 – Check Homework 2 – Cornell Notes: Types of Reactions 3 – “We Do” Practice 4 – “You Do” Practice

Wednesday, February 13 Objective: Bell Ringer: Students will be able to describe types of reactions. Bell Ringer: Balance the following chemical reaction: ___ Zn + ___AgNO3  ____Ag + ___Zn(NO3)2 Zn = 1 Zn = 1 Ag = 1 Ag = 1 NO3 = 1 NO3 = 2 1 2 2 1 x 1 = 1 x 1 = 1 x 2 = 2 x 2 = 2 x 2 = 2 x 1 = 1

Cornell Notes Objective: SWBAT Describe the types of chemical reactions Date: 2/13/2013 Law of Conservation of Mass: Matter/mass can neither be created nor destroyed, only changed. Chemical Reaction: Reactants  Products

Cornell Notes (continued) Synthesis (S) (Combination): In synthesis reactions a new compound is made from simpler substances. A + B  AB Example: H2 + O2  H2O Decomposition (D): In decomposition reactions a compound is broken down into smaller substances. AB  A + B Example: MgO  Mg + O2

Cornell Notes (continued) Single Replacement (SR): In single-replacement reactions one atom replaces another ion in a compound that is in solution. AB + C  A + CB Example: CuCl2 + Al  Cu + AlCl3 Double Replacement (DR): In double-replacement reactions ions from each compound replace each other forming two new compounds as products. AB + CD  AD + CB Example: NaOH + CaCl2  Ca(OH)2 + NaCl

How to recognize which type? Look at the reactants: (E = element and C = Compound) E + E or = Synthesis C + C C = Decomposition E + C = Single replacement C + C = Double replacement

Cornell Notes (continued) Combustion (C): In combustion reactions organic compounds (carbon and hydrogen) burn with oxygen to produce carbon dioxide, water, and energy. CxHy + O2  CO2 + H2O C2H3OH + O2  CO2 + H2O If the combustion is complete, the products will be CO2 and H2O. If the combustion is incomplete, the products will be CO (or possibly just C) and H2O.

Combustion Reaction Examples: C4H10 + O2 ® CO2 + H2O (complete) C4H10 + O2 ® CO + H2O (incomplete) C6H12O6 + O2 ® CO2 + H2O (complete) C8H8 + O2 ® CO + H2O (incomplete)

A + B → AB AB → A + B AB + C → AC + B AB + CD → AD + CB Type of Reaction Definition  Equation Combination Decomposition Single Replacement Double Replacement Combustion When oxygen reacts with a element or compound to produce H2O and CO2 (complete) or CO (incomplete) CxHy + O2 → CO2 + H2O Two or more elements or compounds combine to make a more complex substance A + B → AB AB → A + B Compounds break down into simpler substances Occurs when one element replaces another one in a compound AB + C → AC + B Occurs when different atoms in two different compounds trade places AB + CD → AD + CB A = Red B = Blue C = Green D = Yellow

5) ____ Cl2 + NaBr → NaCl + Br2 6) ____ H2 + N2 → NH3 SUMMARY: Identify the reactions below as COMBINATION, DECOMPOSITION, SINGLE REPLACEMENT, or DOUBLE REPLACEMENT. Use the symbols below INSTEAD of writing the entire word. S= Synthesis D = Decomposition SR = Single Replacement DR = Double Replacement   ____ P + O2 → P4O10 2) ____ Mg + O2 → MgO 3) ____ HgO → Hg + O2 4) ____ Al2O3 → Al + O2 5) ____ Cl2 + NaBr → NaCl + Br2 6) ____ H2 + N2 → NH3