Week 10 11/2-11/5

Highlander Sheet Objective/SWBAT: Understand the correlation between charge and physical properties. End of the Quarter!!! Check your grades. Lots of things were entered. Test will be in today? Warmup: Describe each of your 3 groups that you grouped your chemicals from the lab last week. Responsibilities: Homework Reflect and Connect Questions 1-4, pp November 2

Quiz An old penny is made of copper, which is more dense than zinc. Combustion Cannot create or destroy matter They would be equal Add heat, volume increases (gets bigger) molecules spread out, becomes less dense. Yes Flow of electrical charges through a liquid or solid Ions Barrel/Chimney

Questions

Get Organized! 1. Group the stack of papers in front of you into 3 groups. 2. Be able to explain how your group chose your groupings. Group 1Group 2 Group 3

Physical Properties of 8 Common Materials Data Table Medium

Lets organize this a bit Solubility Soluble with water De-icer Epsom Salts Table Salt Sugar Partially soluble. Aspirin Cornstarch Vitamin C Non-soluble with water. Paraffin wax

Lets organize this a bit Conductivity Conductive in solution Aspirin Cornstarch Deicer Epson Salts Table Salt Vitamin C Not Applicable Sugar Not Conductive in solution Paraffin wax

Lets organize this a bit Melting Point High Deicer Epson Salts Table Salt Low Sugar Aspirin Cornstarch Vitamin C Medium Paraffin wax

Groups (HW#2) Salts Deicer Epsom Salts Table Salt Organics Aspirin (ascorbic) Vitamin C (acetycilic) Acids Paraffin wax Cornstarch Sugar

WHOT Q What does “relative” mean in the term relative melting point.

Highlander Sheet Objective/SWBAT: Understand the correlation between charge and physical properties. End of the Quarter!!! Check your grades. Test will be in today? Have homework out. Warmup: Draw a polar molecule. Why is it that electricity can move through these polar substances? Responsibilities: Check SWIFT and SKYWARD November 3

Charge and Solubility If water is polar… what is the substance that is soluble with water??? Polar!!! But what does that look like??? This is a molecule. A really good one.

Charge and Conductivity What does a substance need to be conductive? Charged particles! But what are they??? This is an atom. Or… Particle (atom) A really good one. A really REALLY good one. But molecules can be charged too.

Do common objects have both negative and positive charges? Gather round for this messy and simple demo. Where have you seen something like this happen before?

What about polar molecules… how do they react? Step 1. Get a balloon, charge it up. See how water molecules react to static electricity. 2. Sketch (large-two thumbs) what you think is happing at the particle level. Remember water is polar! (look at your notes).

Balloon -

Particle diagram of water dissolving salt. Yep. Video

Polar and Nonpolar static interactions.

WHOT QUESTION: Describe the process of salt dissolving. (include the charges of both the salt and the water)

WHOT QUESTION: Create a question about polarity and charge

How do charges behave? Video: Sketch the contraption.

Conductivity cont. What molecule(s) from our lab (not atoms) do you think made charged particles? Which molecule did not?

Charge and Melting Point What is melting point? When molecules break physical bonds between each other. (no chemical change) So if molecules of the same substance only kind of like each other what kind of melting point do they have? What about molecules with a really really low melting point? How much do they like each other??? But TEACHER! ??? What does this have to do with charge??? Items with a stronger internal force to stick together have a stronger bond.

Ionic Bonds Epsom Salt De-Icer Table Salt An ionic bond is the bonding between a non-metal and a metal, that occurs when charged atoms (ions) attract one another

Polar Covalent Bonds

Covalent Bond Dodecane- an alkane in mineral oil A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.

Reflect and Connect Page , complete all (1-4) …Continues on page 108

WHOT QUESTION: WHOT QUESTION: What does it mean to be a charged particle? Include an example of a molecule and an atom.

Grading WHOTs Make sure name is on it. If it isn’t scowl mercilessly at your neighbor. 1pt 2pt

Quiz Make sure you have a book.

Grading the Quiz 1. T 2. F 3. T 4. F 5. F 6. T 7. T

Highlander Sheet Objective/SWBAT: Determine how charged particles interact with water. Responsibilities: Vocab: Conduction Homework!. R&C Questions 1-4(p ) Reminder!!! Last day for test takers to finish! October 23