Chemistry Week

23

Please get out your

Classwork!

February 21, 2013AGENDA:1 – Bell Ringer &

Agenda2 – Review Classwork3 – Review Predicting

Products4 – Quiz Review

Today’s Goal:Students will be able to

review for their Unit 5 Quiz #2

Homework1. Complete Quiz

Review– due tomorrow.

2. Final day for Lab Report is Tomorrow!

3. Week 22 Work is due by FRIDAY!!

4. STUDY FOR YOUR QUIZ

Thursday, February 21Objective: Students will be able to review for

their Unit 5 Quiz #2Bell Ringer: What is the molar mass of Na2SO4?Na =S =O =

2 MINUTES REMAINING…

Thursday, February 21Objective: Students will be able to review for

their Unit 5 Quiz #2Bell Ringer: What is the molar mass of Na2SO4?Na =S =O =

1 MINUTES REMAINING…

Thursday, February 21Objective: Students will be able to review for

their Unit 5 Quiz #2Bell Ringer: What is the molar mass of Na2SO4?Na =S =O =

30 seconds Remaining…

Thursday, February 21Objective: Students will be able to review for

their Unit 5 Quiz #2Bell Ringer: What is the molar mass of Na2SO4?Na =S =O =

10 seconds Remaining…

BELL-RINGER TIME IS

UP!

February 21, 2013AGENDA:1 – Bell Ringer &

Agenda2 – Review Classwork3 – Review Predicting

Products4 – Quiz Review

Today’s Goal:Students will be able to

review for their Unit 5 Quiz #2

Homework1. Complete Quiz

Review– due tomorrow.

2. Final day for Lab Report is Tomorrow!

3. Week 22 Work is due by FRIDAY!!

4. STUDY FOR YOUR QUIZ

Thursday, February 21Objective: Students will be able to review for

their Unit 5 Quiz #2Bell Ringer: What is the molar mass of Na2SO4?Na =S =O =

23.0 g/mol32.0 g/mol4 x 16.0 = 64 g/mol119.0

g/mol

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 1023

atoms (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) The coefficients in a balanced

chemical equation represent the number of moles of that compound that was reacted or produced.

How do you

determine the

number of moles

of a compound in a

chemical

reaction?

__ Na + __Cl2 __ NaCl Na = 1 Na= 1 Cl = 2 Cl = 1

x 2 =2x 1 =2

x 2 =2x 2 =2

22 1

In the chemical reaction 2 moles of sodium react with 1 mole of chlorine to form 2 moles of sodium chloride.

Cornell Notes (continued) 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

What is molar mass?

Cornell Notes (continued)1. Determine types of atoms in a

compound.2. Determine the number of each

type of atom.3. Find their atomic masses.4. Sum all masses! Units = g /

mol

How do you

calculate molar mass?

Practice Problems (Left Side)

Ag =107.9 g1 mol

NaCl =Na =

Cl = 58.5 g 1 mol

LiNO3 =Li =N =

3 x O = 68.9 g 1 mol

23.035.5+

6.914.0

+ (3x16.0)