Mole ratios Mole to mole conversions Unit 9: Stoichiometry Mole ratios Mole to mole conversions

Some stoich fun: Stoichiometry

What is stoichiometry? The quantitative relationships between the amounts of reactants used and the amounts of products formed by a chemical reaction. Which is just a fancy way of saying: “the method you use to figure out how much of a chemical you can make, or how much you need to produce a substance, during a reaction.”

In order to do Stoichiometry you need to be able to do the following: 1. Write chemical formulas 2. Write skeletal equations 3. Know how to balance chemical equations 4. Know how to convert grams to moles/moles to grams 5. How to find and use mole ratios

Mole Ratios: 2H2 + O2  2H2O 5 moles H2 2 moles H2O 2 moles H2 Knowing the mole ratios allows you to begin doing stoichiometry: 2H2 + O2  2H2O If we have 5 moles of hydrogen reacting, how many moles of water are formed? The Amount Given 5 moles H2 2 moles H2O = 5 moles H2O 2 moles H2 Mole ratio between the two compounds in the problem

Mole to Mole Conversions: ____K + ____H2O  ____KOH + ____ H2 If there are 3.5 moles of potassium reacting, how many moles of hydrogen will form?

Mole to Mole Conversions: Propane (C3H8) reacts with oxygen in the air to produce carbon dioxide. If 7.8 moles of O2 are used how much C3H8 was also used? How many moles of CO2 were produced?

Mole to Mole Conversions: Iron reacts with oxygen gas to form Iron (III) oxide If you only had 0.45 moles of Fe how many moles of 
Fe2O3 would you produce? How many moles of O2 were used?

Mole to Mole Conversions: __AgNO3 + __Cu ⇒ __Cu(NO3)2 + __Ag 10.2 moles Cu are used to react with AgNO3, how many moles of AgNO3 were used to react? How many moles of Silver are produced?