Weekly quiz.

This quiz was (as frankenberg said) not too hard. Most of the information was common knowledge by time for the quiz. Some of the simple rules are the ones i forgot (Hunds, Pauli exclusion, etc..). Some big tings that were Incorporated were the wavelength formulas and the different forms of them. I cant do a lamda symbol so just pretend its there. C=_F, E=hF, E=h(c/_). Overall the test could have been a lot worse. Going over the online quiz's helped me study and the note supplements from class are amazing.(keep using those).

spectroscopic analysis lab

Today we did a lab that used spectroscopes to tell us the affect in transmittance that two different elements had at certain wavelengths. The elements were cobalt and copper. While we were testing the transmittance we also tested for absorbency. The spectroscopes( not telescopes ) were machines which you put a vial of water in and set the wavelength at its proper setting and had the transmittance for water at 100. Then you change the water vial out for the cobalt or copper vial and check for transmittance and absorbency. Making sure the vial has no fingerprints or else the data will be bad.

Flame test lab

Today we explored the realm of FIRE (very little songs about ice though). We Took samples of certain liquids on popsicle sticks and put them over an open flame. Many of these samples turned into a variety of colors varying from orange to green and even purple. The part that was the most confusing was the blue cobalt glass. The flames where we had to look through the glass to see them were not showing much change.

New unit info

According to Mrs. Frank this will be a quite easy unit. "Easy" is a relative term so we will see how that turns out. Very quickly we have gotten into a couple sets of notes. All of the notes so far relate to waves. Luckily i took physics last year and some of this is relate-able. The idea of a wave is a set amount of energy is put outwards through a medium. Traveling infinitely in a perfect system. The most common wave we experience is the light wave. Other waves we encounter are radio and microwaves, and ultraviolet rays give us a tan. Most of the information we have learned thus far is pretty straight forward.

The Unit exam

This exam felt a lot like the quiz before. My only real problem with the test was that it took place after we had a whole week to forget about it cause of labs. Moving on. This test was centered around all the previous notes we have done before. the only confusing part of the test for me was finding the ka with the ph and molarity of the solution. To study for this test i went over the big packet with mostly the ph square thingy, and the tests on schoology. Even thought the answer to study guide relationship was a little bit off. this helped with the ice box and titration problems the most. Overall for being the hardest test of the year it didn't feel like it. Which means i probably got a 50%

The unknown acid lab

So lets say you have an unknown acid (solid) and you want to know how to find it. First off you throw away all the data from the previous day and start fresh. This limits your time so you work harder. Next you take a base and acid combo that you already know and use this to find the molarity of the base because that information was somehow forgotten in the making of the base. then take the base you just used and titrate it with the unknown acid. this allows you to find the molar mass of the unknown acid and find out what it is. This is all just hypothetical..... I swear....

Acid and vinegar lab

The process is complete for the acid and vinegar lab. To start out we had to titrate the acid KHP (which is not just K, H, and P). To do this we had to set up the lab by clearing out the burett and filing it with NaOH (base). Taking .5ish grams of KHP and dissolving it in a about 75 ml of water with a couple drops of phenolphaline. Taking the KHP in a flask and put it under the burett to get titrated (make the phenolphaline turn the liquid light pink). Then you take the flask and fill ti with 10 ml of vinegar and then titrate it with the leftover base in the burett. After doing all of this we can find a large amount of different numbers and items. Such as the molarity of the base or the atomic mass of vinegar.

That last test though

So the test was not was what i was expecting it to be. The last part of it with the ice box problems was not my favorite. just in case anyone else had this problem here is the method to do them. Take the Equation X squared over the molarity minus X and set that equal to ka (unless it is less than kw). multiply the equation out to equal zero. Then Find the zeros of the equation on a graph or use the quadratic equation. Finally take this final number and use it as the [H+] to find ph.