Here is a photo of our gross copper product.
Stoich Lab Day 3
After washing the copper we obtained, we ended up with our final product which we later measured along with iron nail. We used these measurements to calculate the theoretical amount of copper as well as the actual amount of copper. Using this data we were able to determine the final solution which was iron chloride 3.
Stoich Lab Day 1
This lab was very interesting. We started out with an iron nail and put it in a jar of copper chloride 2. The purpose of this was to get the iron to react to the chlorine and then it would separate the copper alone. After putting the nail in the solution, we left it sit for a day to let the copper separate.
These are just a few photos of the solution and the iron nail sitting in the solution.
Percent Yield
This lesson was very simple. Percent yield is taking the actual measured amount of a substance and dividing it by the theoretical amount in order to get a percent. Sometimes this percent can be over 100%. See here for more info. It was a very easy concept. I like how easy this unit is so far. The link under the photo has a great explanation and video about percent yields.
This Kahn Academy article gives a great explanation about limiting reagents and percent yields. Click here.
Intro to Stoichiometry
We have reached our last section for the semester. Stoichiometry has to do with finding masses of certain reactants or products by using the mass of a given substance. It's a very useful tool when trying to find a theoretical mass of a product before your experiment begins. The method is done by taking a starting mass of a given substance and converting it to moles. Next, you multiply it by a mole ratio of the substance you want and the given. Finally, convert the new substance to grams and you have the answer. It's a very simple concept. Check out the link under the photo for more info as well as this link here.
Also check out this awesome video here from Kahn Academy.
Chemical Reaction Test
The exam over chemical reactions was a little difficult. There were some rules when it came to writing a chemical formula that I didn't understand, therefore making my grade worse. I felt I had a decent understanding over what chemical reactions were, why they took place, and the different kinds. Check out this video here from Kahn Academy about chemical reactions for a good overview of the unit.
One of my problems was also balancing equations. I, regretfully, fell asleep for the balancing equations lesson and never taught myself the lesson. I wasn't so hot on the subject, hurting my grade on the test. Using this practice really helped me, click here.
One of my problems was also balancing equations. I, regretfully, fell asleep for the balancing equations lesson and never taught myself the lesson. I wasn't so hot on the subject, hurting my grade on the test. Using this practice really helped me, click here.
Precipitate Lab
In this very interesting lab, we put multiple elements with soluble compounds to see if they would create a reaction. We then saw which of the elements had the most amount of reactions to help create a reactivity series. The lab had some really interesting reactions, some I did not even expect, such as the Calcium and Water, which nearly exploded.
Some of the reactions were a pain to clean up!
Precipitate Reactions
Precipitate reactions have to do with how soluble certain elements are with other compounds. Certain reactions can create new gases and solids as a product. This isn't very confusing since it is mostly the same process as all the other reactions we have been learning. After balancing the equations, the states of the elements may change, creating new products. For more information on precipitate reactions, click here.
Also check out this link under the photo.
Also check out this link under the photo.
SigFigs
In order to keep measurements accurate, God gave us wonderful significant figures. Significant Figures are the process where you keep the same number of figures in numbers to keep data accurate. There are many confusing rules with the system such as what zeros are considered to be real and how many decimal places can be used after a certain math function. Click here for a good lesson on SigFigs.
Also check out the link under the picture.
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