Stoichiometry- this will be the hardest topic you will learn all year! Mole-Mole January 26th & 27th This will be the hardest topic you will learn all year

Expectations with new material: While I am going over this lesson I should be the only one talking- if you have a question raise your hand This will be challenging, but even so I do not want to see you quit Stoichiometry- this will be the hardest topic you will learn all year

Why do we use it? Stoichiometry -A process we use in chemistry to figure out how much of something we will produce when starting with a certain amount

Stoichiometry- Moles “Moles” are actually the coefficients out in front of a reaction. Ex: 2H2O2  O2 + 2H2O How many moles do we have of H2O2? How many moles do we have of O2 ? How many moles do we have of H2O? **This means you must make sure your equation is balanced before you solve the problem**

When converting from Mole to Mole: How do we do it? When calculating mole to mole, you will be using a mathematical technique called Dimensional Analysis

Formula will use when converting from mole to mole: What you see below is a basic example of the layout of this type of problem. 1 Moles initially given in problem Moles of “given” from balanced equation Moles of what you want to “find” from balanced equation

Steps to solving Mole to Mole problems: 1. Balance the chemical equation 2. Plug numbers into the formula using the word problem and the chemical equation

Example problem #1: 2KClO3 2KCl + 3O2 How many moles of Oxygen are produced by the decomposition of 6 moles of KClO3?

Example Problem #2: Zn + 2HCl  ZnCl2 + H2 How many moles of H2 are produced from the reaction of 3 moles of Zn?

Example Problem #3: C3H8 + 5O2  3CO2 + 4H2O How many moles of O2 are necessary to react completely with 4 moles of C3H8?

Partner Problems 1. K3PO4 + Al(NO3)3  3KNO3 + AlPO4 How many moles of KNO3 are produced when 2 moles of K3PO4 react completely? 2. N2 + 3H2  2NH3 How many moles of NH3 are produced when reacted with 6 moles of N2?

Independent Work Time You will be passed a worksheet. Complete all of the problems. There should be NO talking during this time Work on this BY YOURSELF.

Al2(SO3)3 + 6 NaOH  3 Na2SO3 + 2 Al(OH)3 Exit Slip Why do we use stoichiometry? 2. ____P + ____Br2  ___PBr3 If Nicole used 5 moles of Br2 to make a reaction, calculate how many moles of PBr3 she must have produced? 3. Given the following equation, If 0.034 moles of Al2(SO3)3 is reacted, determine how many moles of Al(OH)3 is produced. Al2(SO3)3   +  6 NaOH   3 Na2SO3    +  2 Al(OH)3