Sunday, October 26, 2014

Fall 2014: CHEM 312 Lecture 11 Chemical Speciation

This lecture covers fundamentals of chemical kinetics and thermodynamics, mainly as a review. Thermodynamic laws, electrochemical reactions, and acid-base reactions are covered. The thermodynamic discussion relates to Gibbs free energy and equilibrium constants. Kinetic discussion related to its use in data analysis Emphasis of the lectures is applied to information useful for speciation modeling. Calculations and models for speciation are discussed. Equilibrium modeling using EXCEL and the program CHESS are presented. 

23 comments:

  1. This lecture added to the material I learned in quantitative chemistry. It was interesting to learn about long and short range interactions.

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  2. Great comment. I am happy to see courselves concepts extend ideas presented in other chemistry classes.

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  3. I don't think I've seen equilibrium modelling using Excel before, I'll have to play around with that on some practice problems from Quantitative Analysis and see how that helps do the calculations more efficiently.

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    1. let me know if you have any question on the model. The key is how you set up the problem. I detailed description of a model can be found at: http://freewebs.com/solverstat/est/Annali_di_Chimica.pdf

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  4. I do apologize again for the late submission this week. The lecture was easier to understand than the last few and was really great to learn more additional material from other classes.

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  5. The part of the lecture describing how to perform speciation calculations was a little confusing, but having the ability to replay certain parts of the lecture and understand what each cell contained was helpful.

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    1. thanks for the comments. Others may have used similar calculations in previous courses. If you need more information please contact me or follow up with the links on the web page.

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  6. I submitted the quiz. I think this was one of the easier and more interesting lectures. It definitely brought in a lot concepts from quant. It's nice to know that I still remember how to set up the equations and do the calculations. There's no escapign the equilibrium problems! I might take more of a look at the excel program though.

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    1. glad to hear the comments. certainly is more inline with previous chemistry courses.

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  7. Great lecture. Some of the material was review from quantitative chemistry, especially the equilibrium concentrations and activities. Learning how to do speciation calculations on excel provided a new approach on solving those types of problems.

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    1. happy to see overlap with previous courses. always nice to reinforce topics.

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  8. Ya, a topic I am very familiar with and have a lot of experience with calculating values. This was a great refresher to different types of constants, while still introducing new terminology (ie. complexation constant, etc.). Thermodynamics at first sight is very simplistic in general/intro chemistry, but this lecture displays just how in-depth and complex chemical thermodynamics can be in various scenarios. Another insightful lecture!

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    1. thanks for the comments. We are entering the more chemistry directed section of the course.

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  9. As others have stated, this lecture coincides well with the information being taught in Quantitative Analysis. As well as going more in depth on the activity coefficient. In quant, other than stating it exists, no further understanding of it was covered.

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    1. excellent comment. I am happy to see the stated link with other chemistry courses!

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  10. I really liked how this lecture alined with what I am learning in my other chemistry classes. I am still not very experienced with Excel as I should probably be, so I will definitely looking at it more to do speciation calculations.

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    1. thanks for the comment. The excel spreadsheet is just another way to perform the speciation.

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  11. Great lecture. The speciation calculation tutorials with Excel and the CHESS program were helpful.

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    1. Thanks for the comments. For me speciation is a key concept that provides a route to utilize fundamental data.

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  12. I enjoyed the excel integration here. I haven't had to use it since I was in Quantitative analysis, so it was nice to touch on it again.

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  13. I had problems downloading the excel document at that time. I like to follow your steps on my own. I found the table in your upper division class. This quiz was easier than others. Thanks for the lecture!

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  14. This lecture really incorporated a lot of concepts from other courses to Radiochem. It was very nice to see everything come together, and I think it was a good lecture for the end of the course.

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