Intro to Balancing Equations

We started off the class today by going over the notes

Balancing equations

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two very important rules to remember, and that Mr. Lieberman was very persistant in reminding us was:

1. DO NOT CHANGE THE SUBSCRIPTS

2. There are no stead fast rules to balancing equations, so the best way to master this skill is to practice, practice, practice.

After showing us these liberating notes he demonstrated a couple experiments for us. Both of which come with an entertaining story.

1. The Water from hydrogen and oxygen eperiment

It all started when Mr. Lieberman was taking a strol in deserted mountains with no one around and no water. Why he was walking in the heat without water or people in general is a mystary to us all. Well, while he was on this hike he got thirsty, but without any water and no connection to civilization he was stuck in the middle of nowhere without a source of water. This caused a problem for Mr. Lieberman, but it just so happened that a hydrogen spring was there and he was carrying two rulers, a balloon and a match. Attaching the balloon, which he had filled up with hidrogen from the spring, to one of the rulers he was ready to make water. His idea was that if he caused a reaction to occur he could make H2O out of the hydrogen and the oxygen in the air. He ran the experiment and low and behold, there was water (or at least some form of it). He demonstrated this awesome experiment in our class:



Along with this riviting story, came the story of his pet elephant Stampy:

Now Mr. Lieberman owns a pet elephant and this elephant is known as Stampy. Stapmy has needs just like any other elephant, and this includes brushing his teeth. Mr. Lieberman being the thoughtful man that he is makes his own elephant toothpaste, just for his Stampy. He demonstrated the making of this special toothpaste for us in class:



These stories made the class interesting and educational, depicting scinerios that use the topics we are learning of in class. Don't forget to write up the prelab including any tables needed for the procadure. If you don't do that you will get no credit for the WHOLE prelab, as I have had to learn from experience.

And now your next scribe will b.......Brandon L. Congrats

Atom notes and Oleic Acid Lab

Walking into the classroom our hopes were high that the Homecoming Genie would finally make an appearance. But, with only a limited amount of people wearing the spirit day attire of a toga, he failed to reveal himself. After the Genie did not appear we moved on to go over the post lab of the Oleic Acid lab.

1. Finding the volume of oleic acid per drop of solution

Previously in this lab we were to find out the volume of a single drop of methanol. The lab gives you the information that the solution that was used contains .500% of oleic acid. You would then take the number you received from finding the drop of methanol and multiply that by .05.

2. Find the surface area of the oleic acid

The equation for finding the surface area of a circle is π*r². To find the radius you need to divide the average diameter you got earlier and divide that by 2. Then you plug the radius into the equation and you get the surface area.

3.Find the height of the oleic acid layer

The equation to find the height is: volume of oleic acid = surface area * height. You would plug in the volume of the oleic acid that u got in 1 and then the surface area you got from 2. Then divide the volume by the surface area to get the height of the oleic acid.

4. Calculate the width of the molecule

The lab gives you the information that the ratio of height to width for the oleic acid is 18:3. Using this you would take the ratio and turn it into an equation that looks like this:

18 = _h_

3 w

replace the h with the height you got from 3 and then cross multiply so you end up with: 18w=3(the height of the molecule). Then you solve the equation to get the width of the molecule.

5. Calculate the volume of one oleic acid molecule

The equation for the volume is:

V = (4/3) * π * r³

You then take the width of the molecule and divide that by 2 to get the radius. Plug the radius into the equation and solve the equation to find the volume.

These are just a few of the questions we went over in class and the harder ones of the post lab. When Mr.Lieberman finished answering questions we went on to review the notes.

Atomic Strucutre

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The notes we went over in class and once we finished with the notes Mr.Lieberman generously gave us ample amount of time to start our overflow of homework. Tonight's homework is to finish the labs, study for the quiz tomorrow, and a chemthink which is due on Monday.

Everybody don't forget to wear blue and gold tomorrow and show your titan spirit for the homecoming genie!
The next scribe will b.....Colleen Coleman