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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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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 =


2 minutes remaining

2MINUTES REMAINING…


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 =


1 minutes remaining

1MINUTES REMAINING…


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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