1. Sydnee Abernathy Alex Murry Jordan Peterson 7th Period
Mole Ratios
Sydnee Abernathy
Alex Murry
Jordan Peterson
7th Period

2. Stoichiometry
In Chemistry, it’s often necessary to calculate the amount of a substance that is either produced from, or needed to react with, a given quantity of another substance.
Deals with quantitative relationships between reactants and products.

3. Mole Ratios
The mole or mole-ratio method is usually used for solving problems in stochiometry.
Mole Ratio: ratio between # of moles of any two species in a chemical reaction.
Example: 2H2+ O2  2H2O
2 mol 1 mol 2 mol

4. Three Basic Steps of Mole Ratios
Convert quantity of substance to moles (That is, if it’s not given in moles already).
Convert moles of substance to moles of desired substance.
Convert moles desired substance to units in the problem.

5. Significance of Mole Ratios
Mole Ratios are used to convert the number of moles of one substance to the corresponding number of moles in a different substance in a chemical reaction.
Ex: To calculate the number of moles in H2O that can be obtained from 4.0 mol of O2, you would use the mole ratio 2 mol H2O/1 mol O2.
(4.0 mol O2) (2 mol H2O/1 mol O2) = 8.0 mol H2O

6. Chapter 9 Mole Ratio

7. Chapter 9 Mole Ratio
0.053(iron used)/0.082(copper produced) = = 1
mole Cu : mole Fe
1:1