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Outcomes – January 30-Feb1. 1. Receive two mole bucks for having the practice quiz done prio r to the quiz! 2. Revisit naming and formula writing, figuring out how to read the flow chart given 3. Learn what a mole is and why we use the unit “mole” to describe quantity of atoms and molecules!.

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Outcomes january 30 feb1
Outcomes – January 30-Feb1

  • 1. Receive two mole bucks for having the practice quiz done priorto the quiz!

  • 2. Revisit naming and formula writing, figuring out how to read the flow chart given

  • 3. Learn what a mole is and why we use the unit “mole” to describe quantity of atoms and molecules!


Bellwork feb 7 8
Bellwork Feb. 7-8

  • How many atoms of each element are in the reactants side of the following equation:

    2 FeCl3 + 1 Be3(PO4)2 --> 3 BeCl2 + 2 FePO4

    Now, do the same for the products side.

  • What do you notice about the number of atoms?




Outcomes feb 7 8
Outcomes Feb 7-8 the equation are equivalent to each other?

  • Schedule a time with my teacher to re-take Unit 7 Quiz during Office Hours or Seminar, if I need to

  • Be an ace at calculating molar mass for atoms and for compounds

  • Write down that the Unit 8 Test is February 13 (A)-14 (B)


Exit quiz feb 7 8 please use a full sheet of paper
Exit Quiz Feb 7-8 the equation are equivalent to each other?Please use a full sheet of paper!

  • 1. Which type of compound, ionic or covalent, do you use prefixes for?

  • 2. What always goes first in the name of ionic compounds: the cation or the anion?

  • 3. Write the molar mass for one mole of Tungsten, in grams

  • 4. Write the formula: Magnesium chloride

  • 5. How many atoms are in one mole of Carbon?

  • 6. How many grams are in two moles of Na2SO4?


Exit quiz alternate feb 7 8
Exit Quiz – Alternate –Feb 7-8 the equation are equivalent to each other?

  • You are expected to draw the conversions chart and to have your calculator in Chemistry class from now on!

  • 1. How many moles of Hydrogen are in 28.9 grams of Hydrogen?

  • 2. How many atoms of Germanium are in 4.2 moles of Germanium?

  • 3. What must you sum up when calculating the molar mass of a compound?

  • 4. If you have a coefficient of 2 for a compound, what happens to the total number of atoms for an element in the compound?


Outcomes feb 1 2
Outcomes Feb 1-2 the equation are equivalent to each other?

  • 1. Learn how to calculate molar mass

  • 2. Practice writing names and formulas for ionic and covalent compounds

  • 3. Ace an exit quiz which tests your mastery of naming and formula writing and moles


Bellwork feb 1 2
Bellwork – Feb 1-2 the equation are equivalent to each other?

  • 1. Write the formula for lithium carbonate

  • 2. How many atoms of each element are in: 4LiC2H3O2 and 4Mg3(SO4)2

  • 3. Write the name for Si2O4

  • 4. How many moles are in 36.03 particles of Carbon? (Hint: use 6.02x10^23 _______ = 1 mole ____)


Unit 8 moles types of reactions balancing equations

Unit 8 – Moles, Types of reactions, balancing equations the equation are equivalent to each other?


Bell work
Bell work the equation are equivalent to each other?

  • Determine the number of atoms in each of the following (ie: 1 carbon atom, 3 oxygen atoms, etc):

    Li2SO4 Al(OH)3 N2O3

    CCl4 Mg3(PO4)2 BeCl2

  • Name them.


Agenda
Agenda the equation are equivalent to each other?

  • Bell work

  • The mole

  • Practice with conversions

  • Naming Challenge

  • Homework: Molar mass and conversions homework


Honors
Honors the equation are equivalent to each other?

  • Is anyone interested in joining honors for second semester?

  • Pick up an application! The due date has been extended.


The mole and molar mass

The mole and the equation are equivalent to each other?Molar Mass


What is a mole
What is a mole? the equation are equivalent to each other?

  • Quantity of particles

  • Volume of gases at STP (Standard Temp and Pressure

    • We’ll get to this later

  • Mole to mole ratios

  • Molar mass


Dozen = 12 the equation are equivalent to each other?

Pair = 2

Names associated with an amount

Can you think of any more?????


Quantity of particles
Quantity of Particles the equation are equivalent to each other?

  • 1 mole = 6.02 x 1023 particles

  • If I have a mole of M&Ms, how many M&Ms do I have?

  • If I have a mole of pennies, how many pennies do I have?


The mole

The Mole the equation are equivalent to each other?

6.02 x 1023 atoms


6.02 x 10 the equation are equivalent to each other?23

6.02 x 1023 Watermelon seeds would be found inside a melon slightly larger than the moon.


6.02 x 10 the equation are equivalent to each other?23

6.02 x 1023 Donut holes would cover the Earth and be 5 miles deep.

HOLEY MOLEY!!!!


6.02 x 10 the equation are equivalent to each other?23

6.02 x 1023 Pennies would make at least 7 stacks that would reach the moon.


6.02 x 10 the equation are equivalent to each other?23

6.02 x 1023 Grains of sand would be more than all of the sand on Miami Beach.


6.02 x 10 the equation are equivalent to each other?23

6.02 x 1023 Blood cells would be more than the total number of blood cells found in every human on Earth.


6.02 x 10 the equation are equivalent to each other?23

A 1 Liter bottle of water contains 55.5 moles H2O.


6.02 x 10 the equation are equivalent to each other?23

A 5 pound bag of sugar contains 6.6 moles of C12H22O11.


6.02 x 10 the equation are equivalent to each other?23

There are 3 types of moles that live underground in North America: Eastern Mole, Hairy-Tailed Mole and Star-Nosed Mole.


The mole1

The Mole the equation are equivalent to each other?

6.02 x 1023 atoms


6.02 x 10 the equation are equivalent to each other?23 somethings = 1


Why do we use moles
Why do we use moles? the equation are equivalent to each other?

  • Atoms are very, very small.

  • 1 atom of hydrogen weighs approximately 1.67 x 10-27 kg.

  • As a result, it’s not very practical to do chemical reactions by counting out the number of atoms or molecules that will be reacting, because we’ll be counting for a very long time!


  • You’ve seen this before, because when working with a large number of objects, it’s frequently handy to use units that are easier to work with.

  • 2 shoes = 1 pair

  • 12 eggs = 1 dozen

  • 144 pencils = 1 gross

  • 500 sheets of paper = 1 ream

  • 6.02 x 1023 atoms or molecules = 1 mole

  • The idea behind moles is the same as the idea behind “dozens”, except that the number is much bigger.


Why don t we use moles all the time in everyday life could we
Why don’t we use moles all the time in everyday life? Could we?

  • Yes, we could.

  • Although we could use moles to describe numbers of things that we work with everyday, it’s not really very practical.

  • 1 mole of most objects that you work with on a daily basis is very, very large. For example, 1 mole of M&M’s would cover the continental United States to a depth of 125 km.


The Mole….. Could we?

The mole (mol) is the amount of a substance that

contains as many elementary entities as there

are atoms in exactly 12.00 grams of 12C

1 mol = NA = 6.0221367 x 1023

Avogadro’s number (NA)


Molar mass
Molar Mass Could we?

eggs

  • Mass of 1 mole of a compound

  • Units: grams/mole (g/mol)

Molar mass is the mass of 1 mole of in grams

shoes

marbles

atoms


How can you find it
How can you find it? Could we?

1 amu = 1 g/mol

These numbers are proportional

(how convenient!)


What is the mass of one mole of: Could we?

32.06 g/mol

S

C

12.01 g/mol

200.59 g/mol

Hg

Cu

63.55 g/mol

Fe

55.85 g/mol

3.2


How to find the molar mass of a compound
How to find the molar mass of a compound: Could we?

  • Sum the masses of all of the atoms in the molecule

  • Example: NaCl

    Na:22.99 grams x1 atom = 22.99 g/mol

    Cl: 35.45 grams x 1 atom =35.45 g/mol

    Total: 58.44 grams/mol



Try on your own
Try on your own: Could we?

  • Find the molar mass of Mg(NO3)2,

  • MgCl2

  • Fe(OH)2,

  • Be3(PO4)2

    Mg: 24.31 grams x 1 atom = 24.31 grams/mol

    N: 14.01 grams x 2 atoms = 28.02 grams/mol

    O: 16.00 grams x 6 atoms = 96.00 grams/mol

    Total: 148.33 grams/mol

  • MgCl2 95.21 g/mol

  • Fe(OH)2 90 g/mol

  • Be3(PO4)2 217 g/mol


Calculations
Calculations Could we?

  • How do you count out a mole of atoms?

  • You don’t. Even if it were possible to count out individual atoms in a reasonable period of time, the equipment we have only measures “grams.”

  • As a result, we need to be able to convert between atoms/molecules, moles, and grams.


Conversion factors
Conversion factors Could we?

  • 1 mole = _____ g (molar mass)

  • 1 mole = 6.02 x 1023 atoms or molecules (Avogadro’s number)

  • 1 always goes in front of moles!


Use this diagram
Use this diagram Could we?

grams

Molecules

or atoms

Molar

mass

6.02 x 1023

moles

  • Convert as usual

  • Handy hint:

  • In conversion factors, always write “1” in front of “moles”!

  • ******YOU MUST ALWAYS GO THROUGH MOLES!!!********


If you match up what goes on top and what goes on the bottom, you don’t have to remember whether you multiply or divide


1 mol K bottom, you don’t have to remember whether you multiply or divide

6.022 x 1023 atoms K

x

x

=

1 mol K

39.10 g K

How many atoms are in

0.551 g of potassium (K) ?

1 mol K = 39.10 g K

1 mol K = 6.022 x 1023 atoms K

0.551 g K

8.49 x 1021 atoms K

Let’s try a few more…………….

3.2


More practice
More Practice bottom, you don’t have to remember whether you multiply or divide

  • How many grams are in 2.1 moles of Be?

  • How many molecules are in 6.3 moles of CH4?

  • How many molecules are there in 11.1 grams of carbon dioxide?

  • How many grams are in 4.1 x 1023 molecules of H2O?


More practice1
More Practice bottom, you don’t have to remember whether you multiply or divide

  • How many grams are in 2.1 moles of Be? (18.9)

  • How many molecules are in 6.3 moles of CH4? (3.79 x 1024 molecules)

  • How many molecules are there in 11.1 grams of carbon dioxide? (1.51 x 1023 molecules)

  • How many grams are in 4.1 x 1023 molecules of H2O? (18.7 g).


IP bottom, you don’t have to remember whether you multiply or divide

  • Molar mass and conversions IP


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