Unit 2.3- Chemical Reactions

Period 4 Bell Work- Oct 29

• Agenda:1.Planner: Late Work Due by Nov

52.Bell Work3.Good Things4.Tea Light Demo5.Reaction Models

• Bell Work: • What is the chemical structure

of oxygen gas?

Period 6 Bell Work- Oct 29

• Agenda:1.Planner: Late work due by Nov 52.Bell Work3.Good Things4.Webquest

• Bell Work: • What is the chemical structure

of oxygen gas?

Per 6 Groups

1 2 3 4 5 6 7

A Hannah Matt Keegan Konnor Carmen Alie Roxy

B Sammy Caleb Julia Margaret Ty Gavin Chloe

C Alex Kalei Spencer Blake Cally Sabrina Kadie

C Ryan Blu

Types of Reactions Research

• Group A: Combustion and Acid-Base Reactions

• Group B: Synthesis and Decomposition Reactions

• Group C: Single Replacement and Double Replacement Reactions

In your letter group, you will research 2 reactions types. You will then meet with your number group to teach your reaction types to your group.

Since you will be researching 2 reactions and teaching them to your group, it is your responsibility to do your best work to aid your number group in understanding reactions.

Only Work on part A of the paper, we will be working on part B and C later.

Period 4 Bell Work- Oct 30

• Agenda:1.Planner: Late Work Due by Nov 5

1.Finish research on combustion reactions

2.Bell Work3.Good Things4.Combustion Reactions Demos-

Bottle Rocket 5.Research a common combustion

reaction and write 2 paragraphs

• Bell Work: Find your paper on the back counter and DO NOT TOUCH ANYTHING ELSE BACK THERE

Period 6 Bell Work- Oct 30

• Agenda:1.Planner:

1.Late work due by Nov 5

2.Bell Work3.Good Things4.Review Part A of Webquest5.Finish Webquest

• Bell Work:• Ted Talk: Panreatic Cancer and a

Teenage Scientist

Combustion

• Hydrocarbon- a compound containing hydrogens and carbons, sometimes oxygen

CH4 + 2O2 -> CO2 +2H2O

Combustions ALWAYS have the followingReactants Products

Acid-Base (Neutralization)

• General Formula:

• Example:• HCl +NaOH -> NaCl + H2O

• This reaction ALWAYS has:

Reactants Products

Synthesis Reaction

• General Equation:

• Synthesis- “To Combine”

Reactants:

Products:

Decomposition:

• General Equation:

• Decomposition: “To break apart”

• Example: H2O2 -> H2 +O2

• Reactants:

• Products:

Single Replacement

• General Equation:

Your date ditches you for your best friend! Scandal!• Example:• Fe + MgBr2 -> FeBr2 + Mg

Double Replacement

• General Equation:

• You go on a double date and swap dates

• Example: NaCl + LiBr -> NaBr + LiCl

Bell Work- Oct 31

• Agenda:1.Planner: Late Work Due by Nov 52.Bell Work3.Good Things4.Experiment5.Endothermic and Exothermic

Notes6.Experiment7.Discussion/Notes

• Bell Work: • Al +Rust -> Iron and Aluminum

Oxide• Thermite Reaction

• Nitrogen Triiodide• Nitrogen Triiodide Video

• White Phosphorus• White Phosphorus Video

Vinegar and Baking Soda

• Procedure:1.Place the thermometer in the beaker of vinegar

1.Record this Temperature

2.Pour all of the baking soda into the vinegar3.Watch the thermometer to observe any change in

temperature.1.Record the temperature after it has stopped changing

Experiment 1 Experiment 2

Initial Temperature

Final Temperature

Reactants -> Products

• For reactants to form into products, the bonds of the reactants must Break and

the bonds for the products must form

• The breaking and formation of bonds requires energy

Endothermic and Exothermic

• Endo: “In to”• Exo: “out of”

• Endothermic: (cold)• Temperature decreases• Reaction needs energy, so it takes energy from it’s surroundings, causing it to feel cold• It takes more energy to break the bonds of the reactants and making the bonds of the

products • Exothermic: (hot)

• Temperature increases• Reaction releases energy• It takes less energy to break the bonds of the reactants and make the bonds of the

products

Bell Work- Nov 3

• Agenda:1.Planner: Late Work Due by Nov

51.Unit Test Tuesday Nov 11

2.Bell Work3.Good Things4.Hunting the Elements Video

• Bell Work: • Write a chemical equation for a

combustion reaction.• Fill in the chart below

Reactants Products

Bell Work Answers

• Bell Work: • Write a chemical equation for a combustion reaction.• Yours can be different depending on what hydrocarbon you used, BUT it

has to include a hydrocarbon + oxygen forming carbon dioxide and water• CH4 + 2O2 -> CO2 + 2H2OReactants Products

Hydrocarbon Carbon Dioxide (CO2)

Oxygen (O2) Water (H2O)

Hunting the Elements

• This video reviews the periodic table, properties of elements, atomic structure and shows us how we use these elements in real life.

• Please take notes during the video, bullet points are acceptable

• Turn in with your name on it at the end of class

Hunting the Elements- Video