Quiz- Acid Base Thoughts

Wow this feels like the first easy quiz we've ever had. For once I feel like I'm doing chemistry right. A lot of it was doing ice-box and ph calculations which are easy if you memorize the steps.Overall I'm just hoping for a good grade.

Vitamin C Lab

Basically today we learned that Vitamin C is a essential nutrient: we need it to survive. Vitamin C is most commonly found in citrus fruits, but also in various vegetables. Lack of vitamin C can cause disease such as scurvy. Yarr.
     In this lab we worked on comparing the vitamin C concentration of different juices to  a 1mg/mL standard solution. To do this we added starch to 20 drops of each juice, then added a couple drops of iodine. This reaction will make a clear liquid. However, if you continue to add iodine after all the vitamin c has reacted, the solution will turn blue. More trials to do tomorrow. 

End of Unit + Test Thoughts

Uhhh.. yikes. I did very bad on this test. Like the worst I've done on any test I've ever taken. Whoops. I try not to blame myself because I wasn't there for most of the lessons and it's super hard to teach yourself chemistry.. but yikes this is rough. Bye chem grade.

Last Lesson for Aqueous Solutions

And for the last lesson of course we tie it all back to Stoic. Basically now we know how to find grams, volume, moles, or molarity of a substance, using molarity (mol per 1L) as a conversion factor. Using this we can find volume to moles and vice versa. Then from there we can go on to convert to grams. 

Conversion Chart Source

Study Links

Stoic Video
Dilutions
Dilution Video
Molarity Video
Stoic Video 2
Molarity

Solving a Murder Lab Day 2

On day two we weighed the filter paper and it's contents (Silver Carbonate) and used our data to determine the molarity of the reactant (Silver Nitrate) and the murderers identity: Mr. Green!

Mr Green Source

Silver Nitrate: Murder Weapon Source

Solving a Murder Lab Day one

In this lab we are testing unknown solutions with test solutions in order to find a murderer through molarity. In the lab we mixed 10mL of the unknown solution (Silver Nitrate) with 20mL of the test solution, Sodium carbonate in order to form a precipitate. Once the reaction had occurred, we poured the solution into a funnel with filter paper connected to an Erlenmeyer flask to extract the solid. We weighed the filter paper before hand. On day two we will measure the filter paper + solid and determine molarity.

Chemistry in.... Ice Cream?

Today we read an article on ice cream. Basically it was about the science behind ice cream. Ice cream includes many different factors such as air, fats, and coldness. All of these factors help make ice cream as good as it is. No idea what this has to do with aqueous solutions but I do like ice cream.

Source