chapter 8: the mole – part 1
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Chapter 8: The Mole – Part 1. What is Avogadro’s favorite saying from American History?. The Mole. A mole is Avogadro’s number of particles, that is 6.02 × 10 23 particles. 1 mol = Avogadro’s Number = 6.02 × 10 23 particles. How Big is a Mole?. - PowerPoint PPT PresentationTRANSCRIPT
Chapter 8: The Mole – Part 1
What is Avogadro’s favorite saying from American History?
The Mole
• A mole is Avogadro’s number of particles, that is 6.02 × 1023 particles.
• 1 mol = Avogadro’s Number
= 6.02 × 1023 particles
How Big is a Mole?
• Where would you need to go to see 1 mole of rice grains?
How Big is a Mole?
• 1 mole of rice grains is more than the number of rice grown since the beginning of time?
How Big is a Mole?• The worlds fastest supercomputer can count the
world’s population in ¼ second. How long would it take this computer to count to 1 mole?
How Big is a Mole?• The worlds fastest supercomputer can count the
world’s population in ¼ second. It would take this computer 1.9 million years to count to 1 mole?
How Big is a Mole?
One mole of marbles would cover the entire Earth (oceans included) for a depth of three miles.
One mole of $100 bills stacked one on top of another would reach from the Sun to Pluto and back 7.5 milliontimes.
It would take light 9500 years to travel from the bottom to the top of a stack of 1 mole of $100 bills.
How Big is a Mole?• Where would you
need to go to see 1 mole of water.
World’s Fastest Super Computervs.
Super Teacher
The Marble Contest
What is the mass in grams exactly 1 mole of water?
• 1.66 x 10-24 g/amu
1 mol H2O
What is the mass in grams exactly 1 mole of water?
• 1.66 x 10-24 g/amu
1 mol H2O
mol H2O
6.02 x 1023 H2O molecules
What is the mass in grams exactly 1 mole of water?
• 1.66 x 10-24 g/amu
1 mol H2O
mol H2O
6.02 x 1023 H2O molecules
molecule H2O
18.0 amu
What is the mass in grams exactly 1 mole of water?
• 1.66 x 10-24 g/amu
1 mol H2O
mol H2O
6.02 x 1023 H2O molecules
molecule H2O
18.0 amu
amu
1.66 x 10-24 g
What is the mass in grams exactly 1 mole of water?
• 1.66 x 10-24 g/amu
1 mol H2O
mol H2O
6.02 x 1023 H2O molecules
molecule H2O
18.0 amu
amu
1.66 x 10-24 g
= 18.0 g
1 mol H2O = 18.0g
• This is the gram formula mass of water.
• This is the molar mass of water.
• The gram formula mass (molar mass) is the molecular mass of the substance in grams.
What is the mass of 1 mol sucrose (C12H22O11)
1 mol sucrose (C12H22O11) = 342.0g
• 12 x 12.0 = 144.0
• 22 x 1.0 = 22.0
• 11 x 16.0 = 176.0
gfm = 342.0 g
Why 6.02 x 1023
• How did scientists come up with such a random number for the mole?
• It’s really not random at all. It is really just based on a ratio that you already know.
• 1.66 x 10-24 g/amu.
Why 6.02 x 1023
• How many atoms are in exactly one mole of carbon?
Why 6.02 x 1023
• How many atoms are in exactly one mole of carbon?
1 mol C
Why 6.02 x 1023
• How many atoms are in exactly one mole of carbon?
1 mol C 12.0 g C
mol
Why 6.02 x 1023
• How many atoms are in exactly one mole of carbon?
1 mol C 12.0 g C 1 amu
mol 1.66 x 10-24 g
Why 6.02 x 1023
• How many atoms are in exactly one mole of carbon?
1 mol C 12.0 g C 1 amu C atom
mol 1.66 x 10-24 g 12.0 amu
Why 6.02 x 1023
• How many atoms are in exactly one mole of carbon?
1 mol C 12.0 g C 1 amu C atom
mol 1.66 x 10-24 g 12.0 amu
= 6.02 x 1023 C atoms/mol
Why 6.02 x 1023
• How many atoms are in exactly one mole of carbon?
1 mol C 12.0 g C 1 amu C atom
mol 1.66 x 10-24 g 12.0 amu
= 6.02 x 1023 C atoms/mol
Why 6.02 x 1023
• How many atoms are in exactly one mole of carbon?
1
1.66 x 10-24= 6.02 x 1023
Why 6.02 x 1023
• How many molecules are in exactly one mole of water?
Why 6.02 x 1023
• How many molecules are in exactly one mole of water?
1 mol H2O
Why 6.02 x 1023
• How many molecules are in exactly one mole of water?
1 mol H2O 18.0 g H2O
mol
Why 6.02 x 1023
• How many molecules are in exactly one mole of water?
1 mol H2O 18.0 g H2O 1 amu
mol H2O 1.66 x 10-24 g
Why 6.02 x 1023
• How many molecules are in exactly one mole of water?
1 mol H2O 18.0 g H2O 1 amu H2O molecule
mol 1.66 x 10-24 g 18.0 amu
Why 6.02 x 1023
• How many molecules are in exactly one mole of water?
1 mol H2O 18.0 g H2O 1 amu H2O molecule
mol 1.66 x 10-24 g 18.0 amu
= 6.02 x 1023 H2O molecules/mol
Why 6.02 x 1023
• How many molecules are in exactly one mole of water?
1 mol H2O 18.0 g H2O 1 amu H2O molecule
mol 1.66 x 10-24 g 18.0 amu
= 6.02 x 1023 H2O molecules/mol
Why 6.02 x 1023
• How many molecules are in exactly one mole of water?
1
1.66 x 10-24= 6.02 x 1023