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.
Showing posts with label Chemical Reactions. Show all posts
Showing posts with label Chemical Reactions. Show all posts
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.
Driving Force Lab
The other day, we performed a lab where we took two aqueous molecules and put them together to see if they would create a solid. The purpose of the lab was to demonstrate how two soluble molecules can create a solid molecule and how the driving forces can affect this process. It was very interesting to see how some of the reactions would cause an instantaneous reaction that would create a completely different color from the original solution.
The first photo shows our group mixing the two original solutions and the second photo shows a couple solid products of the reactions.
Chemical Reactions
We are starting the new unit: Chemical Reactions. I see this unit is going to be a bit tougher than the previous sections we have covered. We are starting off with balancing equations and looking at the driving forces in reactions. This isn't too bad, but I wish I didn't fall asleep for this lesson. I found a great simulation for balancing chemical equations. Check it out here. Also check out the link under the photo for more information.
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