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1/9/2012 Standards : 3 (Conservation of Matter & Stoichiometry) O bjectives :

1/9/2012 Standards : 3 (Conservation of Matter & Stoichiometry) O bjectives : a . Be able to balance and classify chemical reactions D O NOW : 1. Get out sheet we used last wk before vacation, called Balancing Equations (Std 3) AND Copy classifying codes for chem. eqns.

rhonda-schwartz
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1/9/2012 Standards : 3 (Conservation of Matter & Stoichiometry) O bjectives :

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  1. 1/9/2012 Standards: 3 (Conservation of Matter & Stoichiometry) Objectives: a. Be able to balance and classify chemical reactions DO NOW: 1. Get out sheet we used last wk before vacation, called Balancing Equations (Std 3) AND Copy classifying codes for chem. eqns. HOMEWORK: 1. PrintChemistry 1: Ch 1-11 Review for Final for S1 – Taylorson (1 pt) Std MISC 2. PrintLAB – Solubility of Some Ionic Compounds (1 pt) Std 3 3. Write balance equations and classify reactions Ch 10.1 p. 285-286 14-20. INSTEAD OF FOLLOWING THE DIRECTIONS IN THE TEXTBOOK!!! 4. Watch the video I showed you in class today. (5 pts) Std 3 a. Write down all 5 equations that are balanced in the vid, and balance each. b. For each equation classify in as many ways as you can using the codes we learned in class today. ========================================================= STAMPS: None

  2. Announcement - Very Important In order to correct grades posted wrong or not posted at all, you will need to print a form and complete it. If you have your original assignment, it must be attached to the form as proof of the error. Available on my website at: Standard Stuff > Class Forms and Charts You will find it in Section F Report of Grade Posted Wrong

  3. http://mrwiggersci.com/chem/Std_Forms/Report-of-Grade-Posted-Wrong.htmhttp://mrwiggersci.com/chem/Std_Forms/Report-of-Grade-Posted-Wrong.htm Get these from your Grade Report available on my website This is where I report to you what I did about your issue.

  4. Show only the first equation balancing in class. A Beginners Guide to Balancing Equations (YouTube) You need to watch this entire video at home tonight as homework, be sure to copy all 5 equations, balance each, and classify each using the codes we will learn in class today.

  5. Below are abbreviations for the classifying of chemical reactions. We will use these with the Worksheet – Balancing Equations.  a. SYN - Synthesis – p. 284 b. COM - Combustion – p. 285 c. DEC - Decomposition – p. 286 d. SR - Single Replacement – p. 287       e. DR - Double Replacement - p. 290       f. Ox-Red - Oxidation/Reduction (aka redox) – p. 636 g. AB – Acid/Base - p. 295 A + B ---> C A + O2 ---> C A ---> B + C AB + C ---> CB + A AB + CD ---> AD + CB Charge on ions chg Acid + Base ---> H2O + salt Salt = metal + non-metal Acids have H+ ions Bases have OH- ions Acid Examples HCl H2SO4 H3PO4 Base Examples: NaOH Ca(OH)2 Al(OH)3

  6. Below are abbreviations for the classifying of chemical reactions. We will use these with the Worksheet – Balancing Equations.  Salt = metal + non-metal Acids have H+ ions Bases have OH- ions Acid Examples HCl H2SO4 H3PO4 Base Examples: NaOH Ca(OH)2 Al(OH)3

  7. DEC Ox-Red

  8. 1/10/2012 Standards: 3 Objectives: a. Students will start their final review now, not the night before the exam. b. Prepare for Friday's’s lab - Solubility of Some Ionic Compounds c. Review and practice balancing and classification of reactions DO NOW: 1. Define solubility 2. Classify & balance all homework problems. (see #3 and #4 in "Stamps") HOMEWORK: 1. Complete, balance and classify all reactions on the first row of the lab data sheet ( Pb(NO3)2 with each of the other 11 chemicals on this row). (5 pts) Std 3 =========================================================== STAMPS: Journal 1/9 1. Write balance equations and classify reactions Ch 10.1 p. 285-286 14-20 (3 pts) Std 3 2. Watch the video I showed you in class today. (5 pts) Std 3 all 5 equations, balanced and classified. B Basket First

  9. DO NOT FILL IN THESE BOXES NOW!!!! This is your data sheet for the lab.

  10. 1/11/2012 Standards: 3 Objectives: • Be able to write word, skeleton, and balanced equations DO NOW: 1. Textbook - p. 304 71 (3 words equations, skeleton equations for each, balance skeletons, and classify each. HOMEWORK: 1. Ch 10 Assess - p. 305 72,73, 77, 78. You are copying 8 word equations, creating 8 skeletons, balancing the skeletons, and classifying each equation. (5 pts) Std 3 ======================================================= STAMPS: Journal 1/9 & 1/10 BASKET FIRST 1. Equations complete and balanced, and classified, from row 1 of lab data sheet (5 pts) Std 3 from yesterday 3. Write balance equations and classify reactions Ch 10.1 p. 285-286 14-20 (3 pts) Std 3 4. Watch the video I showed you in class today. (5 pts) Std 3 all 5 equations, balanced and classified.

  11. Complete and Balance 1 Answer?

  12. 2 Answer?

  13. 3 Answer?

  14. 1/12/2012 Standards: 3 Objectives: a. Be able to write ionic and net ionic equations b. Be able to use Solubility Chart (Today's Handout) DO NOW: 1. Define and give one example of each: Ionic equation, net ionic equation (see pages 293-294) HOMEWORK: 1. PRINT & FOLLOW DIRECTION - Solubility of Some Ionic Cmpds - Follow-up Sheet - Do everything but the "Expt Result" column. (5 pts) Std 3 ======================================================== STAMPS: Journal 1/10 & 1/11 1. Ch 10 Assess - p. 305 72,73, 76, 77. You are copying 8 word equations, creating 7 skeletons, balancing the skeletons, and classifying each equation. (5 pts) Std 3 2. Any HW that whole class is not stamped.

  15. 4 Answer?

  16. Balanced Chemical Equation Complete Ionic Equation (separate ions) Net Ionic Equation (only ions that react - form compounds)

  17. GUIDED PRACTICE Balanced Chemical Equation Complete Ionic Equation (separate ions) Net Ionic Equation (only ions that react - form compounds)

  18. 1/13/2012 Standards: 3 Objectives: a. Be able to complete lab Solubility of Some Ionic Compounds - due end of period - 15 points DO NOW: 1. Read lab instructions silently to yourself. HOMEWORK: 1. Ch 10 Assess p. 305 – 306 90-92 Write ionic, net ionic and classify all equations (5 pts) Std 3 Solids will be identified with (s) , liquids (l) , gases (g) Solids, liquids and gases - none of these are written as ions in ionic equations. ======================================================== Lab due end of period. Data sheet complete and questions answered. Homework will be stamped on Tuesday

  19. In chemical equations you may see these subscripts: (l) = pure liquid (g) = gas consider as product if on (s) = solid the right (aq) = dissolved in water (written as ions) If you have any of these on the right side of the equation, that means a reaction will occur! (l) , (g) , (s)

  20. Example: H2SO4 (aq) + CaCO3 (s) ----> H2O(l) + CO2 (g) + CaSO4 (s) Complete ionic and net ionic equations are the same for this equation.

  21. This video will define 4 important terms. Then, 3 actual homework problems will be solved and explained. p. 305-306 90-92 (all)

  22. The following subscripts are used in this HW, you will see them used in the future. aqueous - PO43- (aq) perhaps from the acid H3PO4 (aq) ions dissolved in water solid - Ag2S (s) will not dissolve in water. When an (aq) solution of a compound containing Ag1+ ions is mixed with an (aq) solution of a compound containing Cl1- ions, Ag1+ ions "stick" to Cl1- ions to form Ag2S (s) solid which will not dissolve in water. gas - HCl (g) This is hydrogen chloride (the gas). When bubbled into water, it will form hydrochloric acid which forms H+(aq) ions and Cl1-(aq) ions in the water liquid - H2O (l) Liquid isn't just the state of the substance in this case. Liquid means "pure" water. It is formed as a product in a reaction.

  23. Spotlight.exe p. 305, 90 (c) Notice: equaton was balanced for you already 2 HClO(aq) + Ca(0H)2 (aq) -----> 2 HOH (l) + Ca(ClO)(2) (aq) H2O IONIC EQUATION NET IONIC EQUATION 2 H1+ + 2 ClO1- + Ca2+ + 2 0H1- -----> 2 HOH (l) + Ca2+ + 2 ClO1- H1+ + 0H1------> HOH (l) 2 H1+ 2 ClO1- 2 HOH (l) CaClO Ca2+ 2 0H1-

  24. This video will define 4 important terms. Then, 3 actual homework problems will be solved and explained. CONTINUED - Part 2

  25. Spotlight.exe p. 305, 91 Notice: this equation is not balanced, but I have balanced the molecules and predicted the formation of HBr 3+ 1- 3+ 2- 3 H2S(aq) + 2 FeBr3 () -----> Fe2S3 (s) + 6 HBr (aq)must be balanced 6 H1+ + 3 S2- + 2 Fe3- + 6 Br1- -----> Fe2S3 (s) + 6 H1- + 6 Br1- IONIC EQUATION NET IONIC EQUATION 3 S2- + 2 Fe3- -----> Fe2S3 (s) 2 H1+ S2- Fe3+ 3 Br1- -----> 2 FeS3 (s) + HBr

  26. Spotlight.exe p. 306, 92 (a) Notice: equation was balanced for you in text H3PO4(aq) + 3 RbOH (aq) -----> 3 H2O (l) + Rb3PO4 (aq) IONIC EQUATION NET IONIC EQUATION 3 H1+ + PO43- + 3 Rb1+ + 3 OH1- -----> 3 H2O (l) + 3 Rb1+ + PO43- H1- + OH1- -----> H2O (l) 3 H1+ PO43- + 3 Rb1+ 3 OH1- -----> 3 H2O (l) + 3 Rb1+ 1 PO43-

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