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

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

Let’s write a balanced equation…

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 + 1 C  1Gc2MC

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

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

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

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