Transcript Notes Unit 5-4

Warm up
11-13-15
1. Balance and List the type of reaction
a) _ Al + _ Pb(NO3)2 ---> _ Pb + _ Al(NO3)3
b) _ C3H8 + _ O2 ---> _ CO2 + _ H2O
2. A reaction yield 25%, how many grams of
CO2 produced if the expected amount is
80g?
Agenda
Homework
Go over homework
Notes Unit 5-4
Mole Poster Due Monday
Nov 20 - Quiz Unit 5
Nov 21 - Online HW Unit 5
Dec 9 - Deadline to retake
quizzes and turn in absent work
1. Balance and List the type of reaction
a) _ Al + _ Pb(NO3)2 ---> _ Pb + _ Al(NO3)3
b) _ C3H8 + _ O2 ---> _ CO2 + _ H2O
2. A reaction yield 25%, how many grams of
CO2 produced if the expected amount is 80g?
Unit 5-4 Notes
Stoichiometry
& Moles
STOICHIOMETRY
• The quantitative
aspects of
chemical
reactions.
• Precise
measurement, a
recipe for chemical
reactions
How do we count?
• 1 “dozen” donuts = ____ donuts
• 1 “dozen” eggs = _____ eggs
• 1 “foot” = ______ inches
A “Mole”
• 1 mole = 6.02 x 1023 particles
• Mole = amount of a substance
“mol”
• Avogadro’s Number
• Based on the weight of carbon-12
atoms.
1776 – 1856
Just How Big is a Mole?
• Enough soft drink cans to cover the surface of the earth to
a depth of over 200 miles.
• 602,200,000,000,000,000,000,000 unpopped popcorn
kernels and spread them across the United States of
America, the country would be covered in popcorn to a
depth of over 9 miles.
• If we were able to count atoms at the rate of 10 million per
second, it would take about 2 billion years to count the
atoms in one mole.
Molar Mass
• The mass of 1 mole (not 1 atom) of a
substance
• Units: g/mol
• Molar Mass
Copper
6.02 x 1023 atoms
63.5 g/mol
vs.
Atomic Mass
Copper
1 atom
63.5 amu
Molar Mass
• How to find the mass of compounds
• What is the molar mass of sugar?
• Sugar = C6H12O6
Check-In
1. How many atoms are in 1 mole of
boron?
6.02 x 1023 atoms
2. How many atoms are in 2 moles of H2O?
12.04 x 1023 atoms
3. What is the atomic mass of Oxygen?
Atomic mass= 16 amu (1 atom of oxygen)
4. What is the molar mass of oxygen?
Molar mass= 16 g/mol
5. What is the molar mass of H2O
18 g/mol
Mole Project (10 points)
Individual Project Due Next Class
-Create a “mole” theme poster
-Hand drawn and Color
-Include a 3 key terms from today’s note.
Example theme:
Moleo and Juliet
Molethello
Han Molo
Moledamort
Moleius Caesar
Whack-a-moley
Angry Mole
Pepto Bismole
Pikamole
InstaMole