warm up 11-13-15 1.balance and list the type of reaction a) _ al + _ pb(no 3 ) 2 ---> _ pb + _...
Post on 19-Jan-2016
213 Views
Preview:
TRANSCRIPT
Warm up 11-13-151. 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?
AgendaGo over homeworkNotes Unit 5-4Mole Poster Due Monday
HomeworkNov 20 - Quiz Unit 5Nov 21 - Online HW Unit 5Dec 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 NotesUnit 5-4 Notes
Stoichiometry & Moles
STOICHIOMETRYSTOICHIOMETRYSTOICHIOMETRYSTOICHIOMETRY• 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 – 18561776 – 1856
Just How Big is a Mole?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 vs. Atomic MassCopper Copper6.02 x 1023 atoms 1 atom 63.5 g/mol 63.5 amu
Molar Mass• How to find the mass of compounds
• What is the molar mass of sugar?
• Sugar = C6H12O6
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
Check-In
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 MolethelloHan Molo MoledamortMoleius Caesar Whack-a-moleyAngry Mole Pepto BismolePikamole InstaMole
top related