Mystery Substance Discovered

After the lab we completed on Tuesday, Frankenberg told us what the mystery substance was. It turns out that it was the aspirin that a few of our classmates made during the first half of the year. It was pretty cool to use the aspirin in another lab.

Lab 2

On Monday and Tuesday we did another lab titrating a mystery substance. Our average amount of KHP used was 6.00 mL. My partner and I figured out our percent error which was around 8%. Tomorrow we find out what the mystery substance is.

Titration
pH Calculation
Acids and Bases

Vinegar Titration Lab

In class we spent three days titrating vinegar and KHP to determine the molarity of acetic acid. In order to do this we had to standardize NaOH and then titrate vinegar. It was very tedious getting the perfect shade of pink, but my partner and I managed to get a percent error of just 1.3%.

Study Time!

After the quiz we took I realized I need to study a little more. I did prepare for the quiz, but I was preoccupied when we took it and now I am looking to improve my score. For the exam I am going to try and read the book and work on some practice problems. I also like to complete the practice exams because they are very helpful in solidifying the concepts we learn in class.

Murder Investigation Lab

The murder investigation lab was a great lab to practice finding the molarity of a substance. My lab partners and I mixed Silver nitrate with sodium carbonate to form a substance. We then filter out the substance known as silver carbonate and took the mass of it after it dried for a day. We then determined the molarity of the substance and determined the killer was Mr. Green.

Test Thoughts

I don't believe the test was too difficult. What helped me was doing the practice test that are online and reading the book. Next time I will continue to complete the practice test, but I will also study for 10 minutes longer each day.
Aqueous Solutions
Solubility Rules
Ion Concentration Video

http://labscience10ablock.wikispaces.com/file/view/Molar_triangle%21.PNG/34461223/Molar_triangle%21.PNG

Dilution Lab

In class Friday we did a quick lab to reinforce what we learned in class that day about dilution. The lab included placing 20 drops of food coloring into 10mL of water. Then taking one mL of the stock solution and placing it in 9 mL of water. We continued this pattern until the food coloring was no longer visible. We then used the formula M1V1=M2V2 to perform the correct calculations.

 

Dilution

Molarity

Ion Concentration