Day 153

Hi class,

Don't forget to comment below before your final tomorrow. Hannah Gray, please email me as soon as possible.

Here is a link to the Review Sheet, Practice Test and the Practice Test Key. The correct answers are in boldface. Remember, there is an optional 500-word essay on polymers due the day of the final. Also, you will not receive a report card if you do not return your chemistry textbook. Your Edline grades will be updated tonight with the additional 4 percentage points. If you have any questions, you can ask me via email. Below, I am compiling a list of typos, so please email me if you find any.

Review Sheet Typos
First sentence under Ionic Compound & Metals:An ionic bond is the electrostatic force...

Practice Test Typos
Last problem in first column on first page: a. They contain more protons than neutrons.

Practice Test Key Typos
The answer to the Thermochemistry problem is a not b.
The answer to the unanswered Nuclear Chemistry problem is a.

Day 152

Hi class,

Don't forget to comment below by class tomorrow.

Workspaces is undergoing maintenance today, so I have shared the finals study guide with all of you through Google Drive. I will hand-out hard copies of the study guide tomorrow as well as a sheet with equations, constants, etc. that will be identical to the one you will receive for the final exam. I will also give you a practice test with examples of the types of problems you will see on the final. I will share the practice test on Google Drive when its is complete.

To prepare for the final exam, you simply need to understand the concepts on the study guide and be able to apply these concepts to the practice problems.

Day 151

Hi class,

Don't forget to comment below by class tomorrow.

A summary of today's lecture can be turned in on Monday for an extra grade. Do not simply rewrite your notes. This assignment is optional and is worth at least twenty-five points.

Fifth period: The test on chapter 13 will be administered during class tomorrow. I will hand-out your finals study guide tomorrow. You can ask questions about the final on Friday.

Sixth period: I will hand-out your finals study guide tomorrow. You can ask questions about the final on Friday.

Day 150

Hi class,

Don't forget to comment below by 8 am tomorrow.

There will be a guest speaker tomorrow and a corresponding assignment. For fifth period, the test on chapter 13 will be administered on Thursday. Friday will be a review day. For sixth period, Thursday and Friday will both be review days.

Day 149

Hi class,

Don't forget to comment below by class tomorrow.

As of now, plan for a guest speaker on Wednesday and a corresponding optional assignment due the day of your final.

Fifth period: The recording with the solutions to the homework problems will be available before the end of the school day tomorrow. We will review for the final tomorrow. The test on chapter 13 will be administered during class on Thursday. We will continue reviewing on Friday.

Sixth period: The test on chapter 13 will be administered during class tomorrow. We will review for the final on Thursday and Friday.

Day 146

Hi class,

I'm sorry for posting late again. You can comment on this post anytime before class tomorrow.

Fifth period: Drop your homework on my desk before fifth period begins. I'll make a recording of the solutions to the homework problems that you will need to watch on your own before Monday. If their are many questions regarding the homework, then we will have to skip the demonstrations I was planning to perform. Your test will be on Tuesday.

Sixth period: We will finish going over the homework tomorrow. I'm going to perform a few demonstrations on Monday. Your test will be on Tuesday.

Day 145

Hi class,

Don't forget to comment below by 8 am tomorrow.

The homework for chapter 13 is due tomorrow, and the problems are 1, 2, 4-6, 8, 9, 11, 12, 20-24, 26-29, 36, 38-40, and 42-44.

Day 144

Hi class,

Don't forget to comment below by 8 am tomorrow.

I'm sorry for posting so late. The homework for chapter 13 will be due on Wednesday. For fifth period, the homework problems so far are 1, 2, 4, 5, 6, 8, 9, 11, 12, 20-24, and 26-29. For sixth period, the homework problems so far are 1, 2, 4, 5, 6, 8, 9, 11, and 12.

Day 143

Hi class,

Don't forget to comment below by 8 am on Monday.

There are no new assignments. We will begin Gas Laws on Monday.

Day 142

Hi class,

You don't need to comment on this blog post. For those students in fifth period, I have summarized the last three slides below for the quiz tomorrow.

Surface Tension

• Surface tension is the energy required to increase the surface area of a liquid by a certain amount
• Stronger IMF-->greater surface tension
• Why?: stronger net downward force on surface particles
• Surfactants decrease the surface area of water by disrupting the hydrogen bonds between water molecules
• Examples: soaps, detergents

Cohesion and Adhesion

• Cohesion describes the force of attraction between identical molecules
• Adhesion describes the force of attraction between different molecules
• Some liquids for a meniscus when placed in a narrow container
• Water forms a "smiley" meniscus in a glass tube because the adhesive forces between the water and the glass are stronger than the cohesive forces between the water molecules
• Mercury forms a "frowny" meniscus in a glass tube because the cohesive forces between the mercury molecules are greater than the adhesive forces between the mercury and the glass
• Capillary action is the upward movement of liquids in extremely narrow tubes
• how?: The liquid climbs the walls of the tube due to adhesive forces, which causes the surface area of the liquid to increase. The cohesive forces cause the rest of the liquid molecules to move upward to decrease the surface area. This continues as long as gravity allows.

Solids

• According to kinetic-molecular theory, particles in solids vibrate around fixed locations due to strong IMF
• Most solids are more dense than more liquids
• Why?: stronger IMF in solids than liquids-->particles are closer together/take less space-->greater density