**Welcome to Stoichiometry**

Table of Contents

Date Lecture/Activity pg#

Chocolate Chip Cookie Recipe

2.25 cups flour

8 Tbsp butter

0.5 cups shortening

0.75 cups sugar

0.75 cups brown sugar

1 tsp salt

1 tsp baking soda

1 tsp vanilla

0.5 cups Egg Beaters

2.25 cups flour + 8 Tbsp butter + 0.5 cups shortening +

0.75 cups sugar + 0.75 cups brown sugar + 1 tsp salt +

1 tsp baking soda + 1 tsp vanilla + 0.5 cups Egg Beaters

one batch of chocolate chip cookies

1 Batch of Cookies:

2.25 cups flour

8 Tbsp butter

0.5 cups shortening

0.75 cups sugar

0.75 cups brown sugar

1 tsp salt

1 tsp baking soda

1 tsp vanilla

0.5 cups Egg Beaters

I have 1.5 cups of Egg Beaters.

How many batches of cookies can I make with that many Egg Beaters?

Cookie Calculations!!!!

What is Stoichiometry?

The study of the quantitative relationships in chemical reactions.

*Balanced reactions are key to solving stoichiometric problems

*You need to know:

How to write formula units & molecular formulas

How to calculate Molar Mass & Formula Mass

Molar Conversion: Mass, Mole, Atoms

Determining the Mole-Ratio

Mole-Ratio: shows the relationship between two different reactants or products in a chemical reaction.

*Indicated by the coefficients in a balanced reaction

2 Mg + O2 --> 2MgO

What is the mole ratio between oxygen and magnesium oxide?

Mole Ratio Examples

2 KClO3 --> 2 KCl + 3O2

What is the mole ratio between KClO3 and KCl?

Cu + 2AgNO3 --> Cu(NO3)2 + 2Ag

What is the mole ratio between Copper and silver?

Mass

Moles

# atoms

Molar Conversion Chart

Molar/Formula Mass

____g = 1 mol

Avogadro's Number

6.02x10^23 = 1 mol

Mole to Mole

Step 1: Write a BALANCED EQUATION

Step 2: Determine known & unknowns

Step 3: Determine the mole ratio using the coefficients in the equation.

Step 4: Set up the problem like a unit conversion and solve!

Template

Steps:

given moles

known

moles of

unknown

moles of

known

Mole to Mole Practice

2H2 + O2 --> 2H2O

How many moles of water can be formed from 0.5 moles of hydrogen?

3CuSO4 + 2Al --> Al2(SO4)3 + 3Cu

How many moles of copper II sulfate are required to react with 1.5 moles of aluminum?

Mole to Mole Practice

3Ca + 2AlCl3 --> 3CaCl2 + 2Al

How many moles of calcium are required to produce 10 moles of aluminum?

1. 01/19/16 Welcome to Stoichiometry 1

Objective:

Today I will record the steps required to complete stoichiometric calculations so that I can perform conversions from one mole to another mole of a different element/compound.

Agenda:

Welcome to Stoichiometry - Lecture

ChemCatalyst:

How many atoms are in 52.0 g of Calcium Sulfide?