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Chemistry Week 23

Chemistry Week 23. Please get out your Classwork !. February 21, 2013. AGENDA: 1 – Bell Ringer & Agenda 2 – Review Classwork 3 – Review Predicting Products 4 – Quiz Review. Today’s Goal: Students will be able to review for their Unit 5 Quiz #2 Homework

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Chemistry Week 23

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  1. Chemistry Week 23 Please get out your Classwork!

  2. February 21, 2013 AGENDA: 1 – Bell Ringer & Agenda 2 – Review Classwork 3 – Review Predicting Products 4 – Quiz Review Today’s Goal: Students will be able to review for their Unit 5 Quiz #2 Homework • Complete Quiz Review– due tomorrow. • Final day for Lab Report is Tomorrow! • Week 22 Work is due by FRIDAY!! • STUDY FOR YOUR QUIZ

  3. Thursday, February 21 Objective: Students will be able to review for their Unit 5 Quiz #2 Bell Ringer: What is the molar mass of Na2SO4? Na = S = O =

  4. 2MINUTES REMAINING…

  5. Thursday, February 21 Objective: Students will be able to review for their Unit 5 Quiz #2 Bell Ringer: What is the molar mass of Na2SO4? Na = S = O =

  6. 1MINUTES REMAINING…

  7. Thursday, February 21 Objective: Students will be able to review for their Unit 5 Quiz #2 Bell Ringer: What is the molar mass of Na2SO4? Na = S = O =

  8. 30 seconds Remaining…

  9. Thursday, February 21 Objective: Students will be able to review for their Unit 5 Quiz #2 Bell Ringer: What is the molar mass of Na2SO4? Na = S = O =

  10. 10 seconds Remaining…

  11. BELL-RINGER TIME IS UP!

  12. February 21, 2013 AGENDA: 1 – Bell Ringer & Agenda 2 – Review Classwork 3 – Review Predicting Products 4 – Quiz Review Today’s Goal: Students will be able to review for their Unit 5 Quiz #2 Homework • Complete Quiz Review– due tomorrow. • Final day for Lab Report is Tomorrow! • Week 22 Work is due by FRIDAY!! • STUDY FOR YOUR QUIZ

  13. Thursday, February 21 Objective: Students will be able to review for their Unit 5 Quiz #2 Bell Ringer: What is the molar mass of Na2SO4? Na = S = O = 23.0 g/mol 32.0 g/mol 4 x 16.0 = 64 g/mol 119.0 g/mol

  14. Cornell Notes • Obj: SWBAT Define the Mole and Calculate Molar Mass • Date: 2/20/2013 • A mole is a quantity used to measure the amount of matter present. • Like a dozen = 12 • A mole = 6.02 x 1023 • A dozen doughnuts = 12 doughnuts • A mole of carbon = 6.02 x 1023atoms (particles) of C • A mole of LiF = 6.02 x 1023 atoms of Li and F What is the mole and how is it defined?

  15. Cornell Notes (continued) How do you determine the number of moles of a compound in a chemical reaction? • The coefficients in a balanced chemical equation represent the number of moles of that compound that was reacted or produced. __ Na + __Cl2 __ NaCl 2 2 1 Na = 1 Na= 1 Cl = 2 Cl = 1 x 2 =2 x 2 =2 x 1 =2 x 2 =2 • In the chemical reaction 2 moles of sodium react with 1 mole of chlorine to form 2 moles of sodium chloride.

  16. Cornell Notes (continued) What is molar mass? • Since the mole is always the same number, a mole of different elements or compounds will have different masses. • The mass of 1 mole was defined by Carbon-12. • 1 mole of carbon = 12 g 1 mol • 6.02 x 1023 atoms carbon = 12 g

  17. Cornell Notes (continued) How do you calculate molar mass? • Determine types of atoms in a compound. • Determine the number of each type of atom. • Find their atomic masses. • Sum all masses! Units = g / mol

  18. Practice Problems (Left Side) NaCl = Na = Cl = 58.5 g 1 mol Ag = 107.9 g 1 mol LiNO3 = Li = N = 3 x O = 68.9 g 1 mol 23.0 6.9 35.5 14.0 + + (3x16.0)

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