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February 3, 2015

February 3, 2015. TURN IN YOUR LATE LAB REPORT IF LATE TO THE TRAY ON MY DESK. Pick up turned back papers. Pick up Daily handouts, board and sock Do Now (page 16) What type of reaction has products of carbon dioxide and water all the time?

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February 3, 2015

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  1. February 3, 2015 TURN IN YOUR LATE LAB REPORT IF LATE TO THE TRAY ON MY DESK Pick up turned back papers. Pick up Daily handouts, board and sock Do Now (page 16) • What type of reaction has products of carbon dioxide and water all the time? • What is the general form of a double replacement reaction?

  2. HW Check 2.3.15 What two compounds are found in the products of a combustion reaction all the time? Write the following in formulas: sodium phosphate + calcium chloride yield calcium phosphate + sodium chloride What type of reaction is #2? What is the general formula for a double replacement reaction?

  3. Homework 2-3 Balancing Chemical Reaction ½ sheet Pg. 20

  4. Important Dates Tuesday 1/3 Tutoring 2:30-3:30 Tuesday 1/3 Nomenclature Quiz Thursday 1/5 Tutoring 2:30-3:30 Friday 1/6 Nomenclature Test and NB Check

  5. Week of February 2 Feb. 2 – writing chemical reactions Feb. 3 – balance chemical reactions Tutoring Quiz Feb. 4 - balance chemical reactions Feb. 5 - predicting products Tutoring Feb. 6 - nomenclature test

  6. Agenda 2-2-15 • Do Now • HW Check • 5 min self review • Quiz • Balancing Chemical Reactions • Kahoot!

  7. Quiz • - 5 min self review • - 8 minutes • - if you finish fold length wise (hotdog) and write your name on the outside • - NO voices • - PENCIL ONLY • - NOTHING ELSE OUT

  8. Today is February 3, 2015 Topic: Chemical Reactions Lesson Objectives: SWBAT 2.2.2 Analyze evidence of chemical change 2.2.3 Analyze the law of conservation of matter and how it applies to various types of chemical equations Essential Question: 2.2 Analyze chemical reactions in terms of quantities, product formation, and energy.

  9. Chemical Reactions (p.17) • This is the language to describe a • Chemical Reaction! 1

  10. Chemical Reactions (p.17) • Coefficients are used for balancing reactions. The subscripts DO NOT CHANGE when balancing reactions 1

  11. Balancing reactions (p17) • The law of conservation of mass says that we can not create mass nor destroy mass. • Atoms have mass. • We can not create atoms, nor destroy atoms • Remember: Every atom that goes into a reaction must come out!!!

  12. Balancing reactions (p17) Steps: • 1. Write element list underneath arrow. • 2. Take atom inventory on each side of arrow • 3. Use multipliers (coefficients) to balance elements. • Balance H second to last and O last. If you struggle to balance and are left with ONLY O, double all your coefficients.

  13. Balancing reactions (p17) • ____ H2 + ____ O2 ____ H2O • 2 H 2 • 2 O 1 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side.

  14. Balancing reactions (p17) • ____ H2 + ____ O2 ____ H2O • 2 H 2 • 2 O 1 x2 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side.

  15. Balancing reactions (p17) • ____ H2 + ____ O2 _2__ H2O • 2 H 2 • 2 O 1 x2 = 2 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side. Multipliers become coefficients!

  16. Balancing reactions (p17) • ____ H2 + ____ O2 _2__ H2O • 2 H 2 x2 = 4 • 2 O 1 x2 = 2 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side. Multipliers become coefficients!

  17. Balancing reactions (p17) • ____ H2 + ____ O2 _2__ H2O • 2x 2 H 2 x2 = 4 • 2 O 1 x2 = 2 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side. Multipliers become coefficients!

  18. Balancing reactions (p17) • __2_ H2 + ____ O2 _2__ H2O • 4=2x 2 H 2 x2 = 4 • 2 O 1 x2 = 2 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side. Multipliers become coefficients!

  19. Balancing reactions (p17) • __2_ H2 + __1_ O2 _2__ H2O • 4=2x 2 H 2 x2 = 4 • 2=1x 2 O 1 x2 = 2 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side. Multipliers become coefficients!

  20. Balancing reactions (p17) • ___ H2 + ____ N2 ___ H3N • 2 H 3 • 2 N 1 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side.

  21. Balancing reactions (p17) • ___ H2 + ____ N2 _2__ H3N • 2 H 3 x2 = 6 • 2 N 1 x2 = 2 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side.

  22. Balancing reactions (p17) • __3_ H2 + ____ N2 _2__ H3N • 6 = 3x 2 H 3 x2 = 6 • 2 N 1 x2 = 2 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side.

  23. Balancing reactions (p17) • __3_ H2 + __1_ N2 _2__ H3N • 6 = 3x 2 H 3 x2 = 6 • 2 = 1x 2 N 1 x2 = 2 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side.

  24. Balancing reactions • On a white board with a partner, balance: • ____ S8 + ____ O2 ____ SO2 • ___ AlBr3 + ___ Cl2 ___ AlCl3 + ___ Br2 • __Ca(OH)2 +__NaNO3 __Ca(NO3)2+__NaOH

  25. Exit Ticket 9-8 Balance the following Chemical Reaction ___ Na + ___ O2 ___ Na2O

  26. HW headstart

  27. TUESDAY

  28. Balancing reactions • On a white board with a partner, balance: • ____ CaCl2 + ____ NaOH ____ Ca(OH)2 + ____ NaCl • ____ CaCO3 ____ CaO + ____ CO2 • ___ Na + ___ O2 ___ Na2O

  29. Balancing reactions (p12) • ____ H2 + ____ O2 ____ H2O • Two oxygens on the left mean I need to add one more water molecule to the right. • Now we need 2 more H’s on left. HH HH HH HH HH HH HH HH HH HH H H H H O O H H H H HH HH O O

  30. Balancing reactions (p12) • ____ H2 + ____ P  ____ H3P • 3 H’s on right and 2 H’s on left mean we need have 6 H’s total (least common multiple). Add P HH HH HH HH HH HH HH HH HH HH HH HH HH HH H H H H H H H P P H H H H H HH HH P P

  31. Balancing reactions (p12) • ____ H2 + ____ N2 ____ H3N • 3 H’s on right and 2 H’s on left mean we need have 6 H’s total (least common multiple). HH HH HH HH HH HH HH HH HH HH HH HH HH HH H H H H H H H N N H H H H H HH HH N N

  32. Balancing reactions (p12) • ____ H2 + ____ P  ____ H3P • 2 H 3 • 1 P 1 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side.

  33. Balancing reactions (p12) • __3_ H2 + _2__ P  __2_ H3P • 6=3x2 H 3 x2 =6 • 2=2x 1 P 1 x2 =2 • Underneath the arrow, make your atom list. • On each side, keep track of atoms on that side.

  34. Chemistry in a Bag (pg 12) • GLUE IN AFTER GRADED AND HANDED BACK • Review Lab Safety • Assigned lab groups (2-3) • Review procedures • Review lab report procedures

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