Final Test Review Key

Below is the key for the revies for the final test. Remember, the final test will consist of the molar mass determination lab practical and a 14 question multiple choice section. You will collect data with a lab partner during the lab practical, but perform the calculations for the lab and answer the multiple choice questions by yourself.

Water Freezing Instantly

Just in case you want to show somebody the instant freezing of water demo, I posted the video below.

Tie-Dye Change

Just a reminder that the tie-dye lab has been changed from Friday, May 14th to Monday, May 17th due to cold and wet weather being forecast for Friday. Remember to bring your article of clothing on Monday.

Quiz Reminder and Tie-Dye Announcement

Remember, tomorrow, May 5th, 2010, you will be having a quiz covering the heat of fusion / vaporization worksheet and the heat of fusion lab. All questions will be written. All equations will be supplied for the quiz.

We will be doing the annual chemistry tie-dye lab on Friday, May 14th. You are not required to do the lab. The cost for those that want to do the lab is $4.00. The $4.00 will go to cover all costs for the lab. The dyes are really expensive. Please pay Mr. Brueckner the $4.00 in class as soon as possible. You must also supply the item that you want to tie-dye. White cotton items work the best. You will be given a hand out and instructions on the day of the lab.

Heat of Fusion, Vaporization, and Change in Temp

Below are the solutions to questions #2 and #3 on the backside of the Heat of Fus / Vap worksheet given out in class on Friday, April 30th. This will give you a template on how to complete the problems on the backside of the worksheet. The entire worksheet is to be completed on Monday, May 3rd.

Homework

Read sections 11.1 - 11.6. On pages 350-351 Problems 13, 16, 17, 20, 25, 26, 45, 46, 47, 48

Periodic Trends Quiz #1

Below is the key to the first periodic trends quiz that you did as a take home assessment. Remember, tomorrow in class you will be asked questions similiar to those below, but you will not have your notes available to you. You will be given a periodic table to use.

Light Worksheet / Bohr Model

Below are the solutions to the Light Worksheet. Be prepared to take a quiz on problems associated with this worksheet tomorrow, Tuesday, March 30th.

Material Covered on Wednesday, March 17th

Please look at the previous post for the electromagnetic spectrum chart that you need to print. The material covered today is listed below.

1. The dual nature of light. How light can have both wave and particle properties.
2. The particle nature of light has a momentum like quality. Therefore, when light particles (photons) strike a photovoltaic cell, the light can displace the electrons in the cell and cause an electric current.
3. Two demonstration were performed. The first was using a photovoltaic cell, three LED lights (orange, green, and blue) and a volt meter. Each light was projected on the photovoltaic cell and the voltage produced from the cell was measured. The correlation between voltage and energy is direct. Therefore, a larger voltage produced by a color of light means a larger energy is associated with that frequency of light. The demonstration confirmed the relationship between frequency of electromagnetic radiation and energy.
4. The second demonstration was the heating of a steel rod in a flame from a Fischer burner. The black body (steel rod) began to emit visible light after a certain amount of energy was absorbed. Once again, the visible light seen correlated to ROYGBIV with more energy absorbed resulting in a higher frequency light emitted.
5. The discussion was begun on the Bohr model of the hydrogen atom. The premise is that specific frequencies of light are emitted from a hydrogen atom when electrons are excited and then "fall" back to the ground state. The farther the "fall", the higher the frequency of light emitted.

*As a side note, Evan S. and Eric B. missed the one week that I addressed a number of their far out and obscure theoretical physics questions. Evan and Eric, see me when you get back, I have a lot to show you.

Electromagnetic Chart

Because color copies are beyond our budget, please print a copy of the image above of the electromagnetic spectrum from your home computer / printer. You will need this chart to answer questions on the Bohr model worksheet. Also, know the conversion from meters (m) to nanometer (nm). (1 x 10^9 nm = 1 m) You will need to do this conversion to determine the wavelength of visible light in nanometer. This in turn will allow you to determine what color of light is emitted or absorbed by using the electromagnetic chart.

Material Covered on Tuesday, March 16th

For those of you abscent on Tuesday, March 16th, the following was covered.

1. Wave concepts were reviewed and refined. This included the relationship between wavelength and frequency (inverse) and the product of the two values being the velocity of a wave.
2. We discussed light as a wave and demonstrations were offered to offer support that light travels as a wave, and thus follows all of the criteria of a mechanical wave (i.e. - a wave traveling through a spring).
3. The relationship between frequency of a wave and enerygy was developed. The higher the frequency of a wave, the higher the energy.

All material covered is in the notes package (Power Point presentation) given out.

Ion Separation Lab

Your write-up for the ion separation lab will be due on Friday, March 19th, 2010 (the Friday before spring break). Please follow the instructions given to you in the packet. Also, use the hand-out for typing help in Word. Everything can be typed, so you may have to learn a thing or two about Word to complete the write-up to an acceptable level. Look at the section in the typing help for how to type chemical equations. Remember, the appearance of this lab should look professional. I am open to different formats as long as the basic criteria for the format are met and it is neat, orderly, and easy to follow. Below is the rubric for how your report will be scored. E-mail me at cbruecker@lps.k12.co.us or see me if you have any questions or need any help.

Gas Laws Test Study Reminder / Short Review

Below are four questions that cover the two gas laws that you need to be able to apply on tomorrow's Gas Laws Test. The solutions are given below. I was not able to post the remaining solutions to the worksheets for the chapter. I just ran out of time. Below is a list of what you should make sure that you study tonight. The test is 22 muliple choice questions.

1. Look over the manometer worksheet and know how to do pressure conversions. All pressure conversions will be supplied to you.
2. Know all of the relationships between pressure, volume, temperature, and moles of gas. Know the laws that relate the gas variables. (Boyle's, Guy-Lussac's, Charles', Avogadro's)
3. Know how to use the combined and ideal gas law in a variety of ways. See the problems below for practice.
4. Look over the Ideal Gas Law lab and know how to perform the calculations for the lab.
5. Be able to perform the tasks for the calculator practical that we went over in class.

Study hard and see me before the test tomorrow if you have any questions.

Ideal Gas Law WS - Partial Key

Below are some of the solutions for the Ideal Gas Law WS. The worksheet will be collected on Friday before the exam, but we will go over any questions that you may have tomorrow. So please finish the worksheet so you can ask questions.

Tomorrow will be the review for the gas laws test that will be given on Friday, February 26th. The test is 22 multiple choice questions. Part of the test is a calculator practical. We will practice calculator skills one more time tomorrow. You will also be getting back your Gas Laws worksheet tomorrow to study from. Finally, look at the blog tomorrow for some optional review work. If you need help, please see me before the test on Friday. (Tomorrow is academic Thursday, so use it.)

Gas Laws Worksheet (Partial Key)

Below is a partial key to the gas laws worksheet. Any solution not shown will be graded when collected on Monday, February 22nd.

Stoichiometry Packet #3 Key

Below are the solutions to the remaining problems from the Stoichiometry Packet #3. There will be a quiz over stoichiometry with limiting and excess reactant determination on Friday, February 5th, 2010.

Examples C, D, and E from Stoichiometry Packet 3

Below are the solutions to example problems C, D, and E from Stoichiometry Packet 3. You will work on Stoichiometry Packet 3 during class on Wednesday, 2/3/2010. Please refer to the example problems as you work on the remainder of the packet if you have any questions. The solutions to all problems will be posted on this blog on the night of Wednesday, February 3rd. Please come in for extra help if you need it, but I cannot see you during Academic Thursday of this week. The test over stoichiometry will be Tuesday, February 9th, 2010.

Lab Practical Practice Solutions

Below are the images for the solutions to the practice sheet for the lab practical that you will complete on Thursday, 2/4/2010. Please see me before Thursday if you have any questions.

Stoichiometry Packet #2 Key

Stoichiometry Packet #1 Key

No Key

I am at home and I cannot get my scanner to work, so I cannot post the key to the review. Please come by the room to look at a key posted on the door tomorrow morning. Sorry about the inconvenience.

Mole Figuring

Below is the cut-out images for the mole. It is a jpeg file, so if you want to download it to your computer and "super size" it, you can.