Percent Copper in Brass
Вставка
- Опубліковано 16 вер 2024
- In this video, I dissolve a sample of brass pellets in concentrated nitric acid and then dilute this in a volumetric flask. I examine the absorption spectra of solutions that contain copper(II) and zinc cations as well as sulfate and nitrate anions. I prepare a series of standard solutions of copper(II) nitrate and measure their absorbance at 650 nm, close to λmax for copper(II) cations in aqueous solution. Finally, I measure the absorbance of the solution containing the dissolved brass. Using the data from the video, you should be able to calculate the percent copper (by mass) in the brass sample.
Thank you for this video. Your delivery was at perfect speed. The camera angles were well planned. This will be a great resource for my chemistry & AP-Chemistry students.
i just want to sleep
lmao
aye what up 12CHEM3 🧑🏿🎤
no
I really like that I am still subscribed and got a notification for this
even when i put it into 2x speed its still a little slow
Bruhhhhhhhhhh shout out to ya'll who came here from Dr.Mac's chem lab lmfao
shoutout to McStew's AP Chem class. She's the best
ayyyyyyy
ayyyyyyyy
Probably should keep the flask on the table when taking measurements since when you hold it up you can angle it causing inaccurate readings
Thanks for the feedback, Joseph. I'm assuming you're referring to the volumetric flasks? They have a calibration line that goes around the entire neck of the flask. So if you're holding it up and the line in front matches the line behind ... the flask is being held vertically. It's pretty easy to do with a bit of practice.
I have a letter made of brass with a bunch of gold nuggets attached, Will nitric acid dissolve the brass leaving the gold nuggets behind?
Shoutout to my peers from Mr Morgan's AP Class
epic but not as epic as the nickel sulfate Beer's Law Lab