1. Introduction to Stoichiometry with S’Mores!
Stoichiometry deals with mole, mass and volume relationships in chemical reactions

2. What ingredients do we need to make a S’more?
What do we use to represent the elements?

3. Let’s write a balanced equation…

4. How’d we do?? The “Balanced” Equation 2 Gc + 1M + 1 C  1Gc2MC
2 graham crackers + 1 marshmallow + 1 chocolate piece 1 s’more
2 Gc + 1M C  1Gc2MC

5. Limiting reactant – what you run out of
What is our ratio?
Terminology
Limiting reactant – what you run out of
Limits how much product you can make

6. Total Number of S’mores Made
Ingredients
Number of
S’mores
possible
Total Number of S’mores Made
Remaining
(unused)
Limiting
Reactant
2 Graham Crackers
1 Chocolates
1Marshmallows
______________
20 Graham Crackers
10 Chocolates
10Marshmallows
5 Chocolates

7. Total Number of S’mores Made
Ingredients
Number of
S’mores
possible
Total Number of S’mores Made
Remaining
(unused)
Limiting
Reactant
4 Graham Crackers
2 Chocolates
3 Marshmallows
______________
10 Graham Crackers
8 Chocolates
10 Marshmallows
22 Graham Crackers
5 Chocolates
18 Marshmallows

8. Total Number of S’mores Made
Ingredients
Number of
S’mores
possible
Total Number of S’mores Made
Remaining
(unused)
Limiting
Reactant
24 Graham Crackers
8 Chocolates
8 Marshmallows
______________
18 Graham Crackers
5 Chocolates
12 Marshmallows