1. Illustrate the equation for photosynthesis.. Atomic Structure Chemical Bonding Chemical Reactions StoichiometrySolutions Acid/Base Chemistry Kinetic.

Warm-up

1. Illustrate the equation for photosynthesis.

Review and Recall

Atomic Structure

Chemical Bonding

Chemical Reactions Stoichiometry Solutions Acid/Base

Chemistry

Kinetic Molecular

Theory

Principles of Stoichiometry

Learning Target: Identify and solve different types of stoichiometry problems by balancing chemical equations.

By: Coach Lightfoot

Stoichiometry Stoichiometry: Calculations of quantities in

chemical reactions. BALANCING EQUATIONS! Indicates how much substance you end with

based on how much you started with.

▪ A + 2B AB2

▪ A3B2CD 3A + 2B + C + D

▪ A2 + 3B2 2AB3

▪ A2 + B2 2AB

Stoichiometry Atoms:

# of atoms in reactant = # of atoms in product. Molecules:

# of molecules in reactant = # of molecules in product. Moles: (1 dozen = ?; 1 pair = ?; 1 mole = 6.0 x

1023) A balanced equation indicates the # of moles in the

reactants and products.

N2(g) + 3H2(g) 2NH3(g)

One molecule of N2 reacts with three H2 molecules to yield 2 molecules of NH3.

Stoichiometry Examples

1. N2(g) + H2(g) NH3(g)

2. H2S(g) + O2(g) SO2(g) + H2O(g)

3. CO2(g) + H2O(l) C6H12O6(aq) + O2(g)

Stoichiometry Fun Fact…Isoamyl acetate is the molecule

found in banana flavor. In the production of banana flavor, so many molecules isoamyl acetate is produced that the molecule is also used to make air fresheners and artificial leather!

Try these!!! Take 2min. Identify the reaction type of each

reaction and balance.

1.H2 + I2 HI

2.Na + Cl2 NaCl

Summary…

What is stoichiometry? Explain the relevance of balancing

equations. How much is a mole?

See you tomorrow!

Read Section 12.1

Warm-up

Indicate the reaction type, the amount of molecules and the amount of moles of each reactant and product:

Chemical Calculations

Learning Target: Identify and solve different types of stoichiometry problems using units of moles and masses of reacting particles.By: Coach Lightfoot

Chemical Calculations

Used to convert moles to mass and mass to moles using mole ratios!

Mole Ratios???

The conversion factor derived from the coefficients of a balanced equation interpreted using moles.

When notating moles of substance!

1 mole of H2 WRONG!!!

1 mol of H2 WRONG!

1 mol H2

ALMOST!!!1mol H2 RIGHT!!!

How We Use Mole Ratios!

Converting moles to moles!N2(g) + 3H2(g) 2NH3(g)

Calculate moles of NH3 produced when 0.60mol N2 reacts with H2.

How We Use Mole Ratios!

Converting moles to mass! N2(g) + 3H2(g) 2NH3(g)

Calculate number of grams of NH3(g) produced by the reaction of 5.40g of H2(g)

with an excess of nitrogen.

In Summary…

mA nB

Try These!!! Take 2min.

5C(s) + 2SO2(g) CS2(l) + 4CO(g)

Calculate moles of CS2 produced when 2.7mol C reacts.

Summary…

Moles can be converted to any other unit measurement related to the unit mole.

See you tomorrow!

Study your notes!!!

Warm-Up

Review & Recall

Limiting Reagent and Percent Yield

Learning Target: Indicate limiting reagents in chemical rxns and calculate percent yields.By: Coach Lightfoot

Limiting Reagents

Take 2min: What things are the most important to consider when cooking?

Limiting Reagent: Substance in chemical rxn that used up completely. Rxn will proceed until the limiting

reagent is used up. Excess Reagent:…?

Percent Yield

Theoretical Yield: The amount of product that is calculated to be produced in a rxn.

Actual Yield: …? Percent Yield: Ratio of actual yield and

theoretical yield expressed as a percent.

Limiting Reagent and Percent Yield

Percent yield is a measure of the efficiency of a rxn carried in the lab. Ex.▪ …▪ …▪ …▪ …▪ …

Take 2min: What factors can cause actual yield to be less than the theoretical yield?

Fun Facts…

Try these!!! Take 2min.

Summary…

See you tomorrow!

Read Section 12.3! Test Friday!

Warm-Up

Review & Recall

Limiting Reagent & Percent Yield

Learning Target: By: Coach Lightfoot

Limiting Reagent & Percent Yield

Limiting Reagent Excess Reagent

Limiting vs. Excess Reagents?

Limiting Reagent

Excess Reagent

Reactant that’s being used up!

Reactant that’s not being used up!

Determining Limiting/Excess Reagents!

Fun Fact!

Take 2min: Try these!

See You Tomorrow!

Study for the Test! Quizzes and Worksheets!

Warm-Up

Theoretical Yield vs. Actual Yield

Theoretical Yield

Actual Yield

Maximum amount of product that could be formed from given amounts of reactants.

The amount of product that is actually formed when the rxn is carried out in the lab.