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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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slide1
Chemistry Week 23

Please get out your Classwork!

february 21 2013
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
thursday february 21
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 =

thursday february 211
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 =

thursday february 212
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 =

thursday february 213
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 =

february 21 20131
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
thursday february 214
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

cornell notes
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?

cornell notes continued
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.
cornell notes continued1
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
cornell notes continued2
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
practice problems left side
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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