Spectrophotometric determination of an equilibrium constant
Вставка
- Опубліковано 18 вер 2024
- Determining the equilibrium constant for the synthesis of iron(III) thiocyanate. In this video, we obtain the absorption spectrum for the complex ion. We collect absorbance data to create a Beer’s law plot for iron thiocyanate. And finally we collect absorbance data to calculate the equilibrium constant for the synthesis reaction.
You are a very kind and life-saving person for uploading videos like this. A video like this doesn't help a LOT of people; but for the people it DOES help, it means the world. Thank you
Hello AP Chem students it is me Joe Smith
Hello Joe Smith, what is your opinion on the Ikazuchi Class Destroyer warships used by the Japanese Imperial Navy from the time period 1860 to 1910?
@@timtemtaka 兄弟は道を抜け出す兄弟、お母さんはファッキンビーニーウィーニーを作った
@@timtemtaka oddly specific don’t you think 🤨
nice video, thank you
This is a great video, especially for students who missed the lab. Is there any way to share the worksheet that goes along with this particular lab? The numbers I have for my vernier lab are different.
Awesome teaching thank you!
Can you post the sheet you mentioned in the video?
NICE JOB!
Why did you have to top off the volumetric flask with water if you were measuring accurately and every flask was meant to have the same volume? Does that mean one of your standards may have had less/more ion soln than planned?
Hello Jennifer. I’m not sure what you’re referring to here.
How do u calculate the contraction of FeSCN^2+
At which point? You calculate the concentration of FeSCN2+ in the flasks for part 1 ... to create the Beer’s Law plot. Then in the second part of the lab, you use the equation of the line from the Beer’s Law graph to calculate the concentration in the equilibrium test tubes.
@@chempatenaude how do calculate the concentration after you get the absorbance? You said it tells you in the paper but I dont have the same paper and cant see it from the video at the time 13:15
@@luffyalways I assume you’re referring to calculating concentration of FeSCN in order to create your beers law plot. Think about the volumes and concentration of the iron nitrate and potassium thiocyanate that I am using in each flask. You can perform a dilution calculation to determine their initial concentrations once they are mixed with the water in the flask. Then write the reaction between Fe3+ and SCN- to create FeSCN2+. Create an ICE table underneath the equation. Fill in the initial concentrations for the first flask. You should notice that the iron is much much greater concentration than thiocyanate. This drives the reaction essentially to completion. So you can fill in the ICE table and calculate the concentration of iron thiocyanate at the end. You can repeat this for the remaining flasks. At that point, you will know the absorbance values and the concentrations for each FeSCN solution. You can create your beers law graph.
Hi Stoga
korean ginger