Showing posts with label Chemical Reactions. Show all posts
Showing posts with label Chemical Reactions. Show all posts

Tuesday, December 8, 2015

End of unit

Chemical Reactions- Source
Well I feel like I didn't have that hard of a time understanding this unit, but I'm still struggling with the tests. I'm really not sure how to improve on tests because I know I understand it and I study a lot so I'm not sure. Anyway, not a horrible section. Less math the better.

Writing Equations

Molecular equation is the complete reaction formula

Ionic equation is the broken down formula (Only things that are ionic get broken down- ex:solids do not get broken down)

Net Ionic equation is the driving force. (Ionic minus the 'spectator ions'- ions not used to produce the driving force.)

Links: Net ionic Info

More thoughts on reactions

Still working to understand a bit more about the reactions:
The types of reactions are:
Redox
Double-replacement 
Acid-Base.

There are different types of Redox Reactions:
Synthesis A+B = AB
Single replacement  AB+C+AC+B
Decomposition AB=A+B
Combustion A+B+02= AB

Redox reaction's driving force is the transfer of elections.

Double replacement's driving force is the solid produced.

Acid-Base's driving force is the production of water. 

Resources: 
Different types- Video  / Web

Source

Thursday, December 3, 2015

Redox Lab

Passed the prelab quiz! This lab was really cool. Basically we were testing oxidation rules in redox reactions by combining elemental solids and aqueous compounds and then writing down whether a chemical reaction occurred or not. These reactions took a little while but overall they were super cool to see! Afterwards we created a reactivity series based on our data. We also wrote all the net ionic equations for our reactions which helped me understand redox reactions much more through repetition.
Oxidation rules
Oxidation numbers
Agents
Our reactions as they were reacting!
Our reactions once they were finished reacting

Test Prep

Overall, I feel pretty okay for this test. Not that that means much. I think the thing I have trouble with is telling the difference in the types of reactions. There was so much information in this one section that it's blurring together. Hopefully I can pull it together. Some helpful resources:

Video on Redox: Linda Hanson
Balancing: ErhsChem
Acid-base Reactions: Crash Course
Double-replacement reactions: GetChemistryHelp

Monday, November 23, 2015

Solubility lab

This week we completed the solubility lab. I passed the pre-lab quiz so I was able to get started right away. Basically we had a chart of certain chemicals & mixed them together in a palette to determine whether they have a driving force or not. I predicted the entire chart the night before by working out each equation. This made it a lot easier to complete all the ionic formulas as I only had to redo the ones with an unexpected result. My favorites in this lab were the reactions that turned vibrant colors.
Our palette of reactions!
Such as the yellow one here.