Titration is a technique used to determine the concentration of an unknown acid or base. It was helpful to know what titration was since we would be referring to it throughout the entire unit. In most cases we would need to find the concentration of the analyte by titrating the unknown solution. The chemical reaction was complete when a color change occurred in the analyte. This indicated that the endpoint has been reached. You knew how accurate you were by calculating the difference between the equivalence point and the endpoint, which is known as the titration error.
Very Helpful Titration Information
Titration Calculation Help
Characteristics of Acids vs Bases
Acids
Bases
Acid vs Base
- Taste sour
- Feel sticky
- Pink/Red Litmus paper
- Produces hydrogen ions
- Increases amount of H+ in a solution
- Breaks apart HCl-
- 1-6.9 Ph
- Bronstead-Lowery
- Donate protons (H+)
- Produce conjugate bases after the acid protonates
Bases
- Taste bitter
- Feel slippery
- Blue Litmus paper
- Produce hydroxide ions
- High OH- concentration=High Ph
- 7.1-14 Ph
- Bronstead-Lowery
- Accept protons that the acid donated
- Suck in H=
- Produce conjugate acids
Acid vs Base
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| http://www.dlt.ncssm.edu/tiger/diagrams/acid-base/pH_scale.gif |
New Type of Lectures
This unit we really started using lecture supplement sheets more and more, and I loved it. It wasn't better just because we didn't have to write a ton, but they were more beneficial for the student. I used to be so focused on just copying down every single word on the smart board. Now, I could direct my attention more towards how the problems were being executed. I felt that I absorbed more and learned more this way. I hope we continue to use these beautiful pieces of paper to enhance our learning. Hopefully, this will translate into better test scores. :)
Murder Investigation Molarity Lab
This lab was just stupendous. I found it much more enjoyable than other labs due to the fact that this lab came with a backstory and a mystery to figure out. It makes the experiment more engaging and intriguing since we have something extra to discover. We did a great job throughout the lab and felt pretty confident with our choice of the culprit for Mrs. Scarlet's death. We figured this out from calculating the molarity of an unknown fatal substance. I hope we have more labs like this in the future.
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| http://www.chemtech.org/cn/cn206/images/5-molarity.gif |
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| http://www.nsta.org/main/news/stories/images/scope/0704/SafetyPic.jpg |
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| http://point5digital.com/tn/wp-content/uploads/2014/12/crime-lab.jpg |
More Molarity
Crime Scene Investigation Guide
Identifying an Unknown Substance
First Lesson of the New Year
This lecture was fairly smooth. I feel like I had a pretty good understanding of the lesson. The lesson was titled "Using Molarities in Stoichiometric Calculations" and it began with a very helpful flow chart. A key point that really helped me was the concept of "want/have" or "what you want over what you have". That concept really helped me through the first example and simplified the lesson. After that we learned two new key terms: endpoint which is the moles of acid = moles of base, and titrate= acid base reaction.
Stoichiometry & Reactions
Using Molarity in Calculations
Helpful Video Based on the Lesson
Stoichiometry & Reactions
Using Molarity in Calculations
Helpful Video Based on the Lesson
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| http://2012books.lardbucket.org/books/introduction-to-chemistry-general-organic-and-biological/section_09/ea1d4940033105bd3e47086d18eb745a.jpg |
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| http://2012books.lardbucket.org/books/principles-of-general-chemistry-v1.0/section_08/39d6d188709bfb7c4d18e1acfa53bead.jpg |
| https://figures.boundless.com/14274/full/slide2.jpe |
First Lab of 2016
This lab was fairly easy. We picked our choice of food coloring as blue. Then we put that food coloring into a small cup and kept on extracting a sample of the previous solution and adding it with water. This caused the color to eventually disappear.
Stoichiometry Test and Iron Lab
Before we took the unit test, we did the Copper Chloride and Iron Lab. This lab consisted of adding Copper Chloride to an iron nail and watching how it transformed the mass of the nail. The copper chloride quickly rusted the nail, and left it around 1 gram lighter in mass. We then had to figure out if we used an iron nail that was 3+ or 2+ . Ours ended up being 3+. The real focus here is the test though. Once again I felt somewhat confident coming into the exam, but once I start the test I just seem to forget everything. I don't think it's possible to get a worse score than I did on the last unit test. I am nervously awaiting the results.
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