TuesdayJanuary 29, 2013

(Mole to Mole Stoichiometry)

Bell RingerTuesday, 1-29-13

In the following reaction, 5 moles of hydrogen gas will produce how many moles of water?

H2 + O2 æ H2O225 moles ? moles

Hydrogen gas and water are in a 2:2 or 1:1 mole ratio, therefore 5 moles of hydrogen

gas will produce 5 moles of water.

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Assignment Currently Open

Summative or

Formative?Date

Issued Date Due Date Into GradeSpeed Final Day

QUIZ 15 S5 1/11 1/15 TODAY

QUIZ 16 S1 1/18 1/18 1/24 2/7

WS - Introduction to Stoichiometry and Mole Ratios

F7 1/23 2/1 2/1

WS – Review of Molar Mass F8 1/24 2/1 2/1

Project Share Quiz – Reactions and

BalancingF9 1/25 1/25 2/1

Types of Stoichiometry Problems

Mole – Mole Conversions: The given and unknown quantities are both

amounts in moles.When you are given the amount of a

substance in moles and asked to calculate the amount in moles of another substance

in the chemical reaction, the general plan is:

Example: 13 moles of aluminum oxide will produce how many

moles of aluminum?

2Al2O3 → 4Al + 3O2

Mole ratio of Al2O3 to Al: 2:41:2

13 mol Al2O3 → 26 mol Al

Mole – Mole Conversions

Mole - Mole StoichiometryMole - mole stoichiometry enables you

calculate the number of moles of a substance that is a reactant or a

product in a reaction if you know the number of moles of another substance

in the same reaction.

Magnesium metal reacts with oxygen gas to produce magnesium oxide. If 5 moles of magnesium metal react, how

many moles of magnesium oxide will be produced?First, write the balanced chemical equation.

Mg + O2 æ MgO

Using the formula for mole – mole conversions, the calculation would look like this:

Mole - Mole StoichiometrySample Problem

22

5 mol Mg

1X

2 mol Mg= mol MgO

mol MgO25

In the space shuttle, the carbon dioxide exhaled by astronauts has to be removed to prevent the crew from

suffocating. Carbon dioxide can be removed by its reaction with lithium hydroxide to produce lithium carbonate and

water, which are not harmful to the astronauts.Write the balanced chemical equation for the reaction, then

determine how many moles of lithium hydroxide are required to react with 20 mol of carbon dioxide, the average

amount exhaled by each crew member each day?

Mole - Mole StoichiometrySample Problem

CO2 + LiOH æ Li2CO3 + H2O220 mol ? mol

Mole - Mole StoichiometrySample Problem

CO2 + LiOH æ Li2CO3 + H2O220 mol ? mol

20 mol CO2 X =1 1 mol CO2

mol LiOH2 mol LiOH40

Worksheet

Mole to Mole Stoichiometry