1. Using a balanced equation to convert units of a chemical.
Stoichiometry
Using a balanced equation to convert units of a chemical.
Venetia Collier

2. Stoichiometry Building our Basic Cards
Card 1 front g
mol
Hint: from periodic table
Card 1 back
mol g
Hint: from periodic table

3. mol ratio 1 mol ratio 2 mol ratio 2 mol ratio 1 Making Card 2
Card 2 front
mol ratio 1
mol ratio 2
Hint: from balanced equation
Card 2 back
mol ratio 2
mol ratio 1
Hint: from balanced equation

4. 1 mol 1 mol 6.02x1023 6.02x1023 Making Card 3 Atoms, molecules or ions
Card 3 front
1 mol
6.02x1023
Atoms, molecules or ions
Card 3 back
6.02x1023
Atoms, molecules or ions
1 mol

5. 1 mol 22.4 L 22.4 L 1 mol Making Card 4 Hint: gas at STP
Card 4 front
1 mol
22.4 L
Hint: gas at STP
Card 4 back
22.4 L
1 mol
Hint: gas at STP

6. Using cards to solve a 1 step problem
Given 3.5 moles of sodium chloride, how many grams do you have?
Step 1: Start with the given from the problem.
3.5 mol NaCl

7. Using cards to solve a 1 step problem
Given 3.5 moles of sodium chloride, how many grams do you have?
Step 2: Pick 1 of your 4 cards which will allow you to cross cancel units.
Which card is it?
Card 1 front side g
mol

8. Using cards to solve a 1 step problem
Step 3: Place in grid for 1 step problem.

9. Using cards to solve a 1 step problem
Step 4: Multiply and divide.
Answer= 200g NaCl

10. Using cards to solve a 2 step problem
Given 18 grams of water,
how many molecules do you have?
                                                                   
Step 1: Start with the given.
18 g H2O

11. Using cards to solve a 2 step problem
Step 2: Pick your first card making sure you can cross cancel units.
Your first card should be mol g
Step 3: Place in 2 step grid.
18g H mol H20
g H20

12. Using cards to solve a 2 step problem
Step 4: Pick another card to cross cancel units then place in grid.
What card do you use? x 1023molecules mol

13. Using cards to solve a 2 step problem
Step 5: Multiply and divide.
Answer: 6.02 x H2O molecules