Electronic Structure Quiz

Overall I feel pretty confident about this unit. I don't have a ton of time to study but I'm pretty sure I know the material well. Let's hope for the best! Here's some study stuff:

Electronic Structure Video 1

Electronic Structure Video 2

Periodic Trends Video

Calculating Energy

Electromagnetic Spectrum

Periodic Trends

Wavelength Lab

In this lab we held a spectroscopic analysis with a spectrophotometer, in order to see the wavelengths of chromate and cobalt. We adjusted various knobs on the spec 20 and found the amount of light in blue and pink solutions, which were our metals. This lab was tedious and very boring

Flame Test Lab

Today we got to play with fire. Basically we took solutions and held them in a flame to determine what color they burned. From the color we can tell wavelength, and then calculate energy. Here so pics of the awesome colors!

Electronic Structure

The next unit, Electronic Structure, This unit is more based on concepts than math, unlike our previous units. There is a lot less little variations. We learned about the wave nature of light. We also talked about wavelength, the wave spectrum, frequency, and calculating energy. Hopefully this continues to be easy.

Source

Acid Base Test

Overall, I feel pretty confident about this test. I feel like this is the first unit in a long time that I understand. I did study quite a lot so I'm really hoping for a good grade. Here's some helpful links!

Acid Base video 1

Acid Base Video 2

Acid Base Equation Video

Online Titration

Acid Base Khan Academy

Acid Base Vision Learning

Unknown Acid Lab

More titration, woooo. It's very tedious and time consuming.  This lab has basically the same set up as the Acetic acid lab except instead of vinegar, we used an acid with an unknown concentration. The acid was a solid, so first we had to use the hot plate with the stirrer to dissolve it in distilled water. We were able to get a pretty good pink color on most of our titrations, however our average was very low so we had to do many trials.

Acetic Acid Lab 2

This lab we set out to find the percent of acetic acid in common vinegar. We standardized a solution of NaOH with the acid potassium hydrogen phthalate (KHP) in a titration to determine the molarity of NaOH. Next we used the standard NaOH solution to determine the percent of acetic acid in vinegar. Lastly we diluted 10mL vinegar with 90 mL distilled water to make a 100mL solution, add our KHP and titrate as usual. We used this dilution to compare. The lab was pretty fun. 

Acetic Acid lab

We began the Acetic Acid Lab today. This lab means we get to do titrations first hand. Today we just practiced the lab because it's quite tricky. A titration is  where a solution of known concentration is used to determine the concentration of an unknown solution. The titrant  is added from a buret to a known quantity of the unknown solution until the reaction is complete. In our lab, the titrant was our base, NaOh and the unknown solution is the substance in the flask, KHP and Acetic Acid, The indicator  is phenolphthalein, which turns the solution pink when the endpoint is reached. Also phenolphthalein is my new favorite word.

Here's the video Frank showed us in preparation for the lab:
Video