Hydrogen Peroxide Analysis
Vložit
- čas přidán 16. 12. 2012
- Redox titration to determine the percent hydrogen peroxide in a drugstore chemical.
This video is part of the Flinn Scientific Best Practices for Teaching Chemistry Video Series, a collection of over 125 hours of free professional development training for chemistry teachers - elearning.flinnsci.com
ATTENTION: This demonstration is intended for and should only be performed by certified science instructors in a safe laboratory/classroom setting.
Be sure to subscribe and check out more videos!
Subscribe: czcams.com/channels/inn.html...
Facebook: / flinnscientific
Website: www.flinnsci.com/
Hey Bob Lewis! You were my high school chemistry teacher at DGN in 1999! Now I'm a high school chemistry teacher too :)
This comment was cute.. sorry
I have some "old" H2O2, I know, because the square brown bottle is "bloated", but I'd like to titrate to see. I have KMnO4, but the vid didn't help with the math. For ex. 10 drops -- or say 1/2ml of H2O2, would take what weight of KMnO4 to come out to 3%? I'm 74, and tho I have a BA in Chem, it has just been too long.
Excellent video. Thanks, Bob! I am working on producing a nanosilver H2O2 solution to be used in dry fogging for sterilization of medical facilities. I am experimenting with trying to stabilize 35% H2O2 with atomic silver nanoparticles. I need a quick reference as to the O2 that has been lost. Thanks, again. The video answered my questions. I'm going to weigh the mass before and after. Perfect! I love a small scale, quick referencing method.
This guy _loves_ his transfer pipettes... lol
OMG, molamity! I love this. I prefer to do everything by mass when possible, and up until now I've mostly used mass fraction for labeling solutions and doing gravimetric titrations. I will henceforth be using molamity. But not that deformed M symbol.
FYI, I looked it up, other sources are defining molamity as moles solute per kilogram solution, not per gram solution.
What is the chemical equation for this? H2O2 and KMnO4 are both oxidizers, so which species gets reduced?
Glaudge The equation (unbalanced) is:
H(+) + MnO4(-) + H2O2 -> H2O + Mn(2+) + O2
The MnO4(-) is the stronger oxidizer (higher standard reduction potential), so the Mn gets reduced from +7 in the permanganate to +2 in the Mn(2+).
The H2O2 is the stronger reducing agent (lower standard electrode potential), so the Oxygen gets oxidized from -1 in the permanganate to +0 in the O2 gas.
আমি হাইড্রোজেন পানিতে মিক্সড করাত পর, কতদিন পরযন্ত বোতল এ রাখত পারব ?
Cost of making hydrogen peroxide per liter???
Mix hydrogen peroxide and dettol??? What happened??
Porus all gaya hai sollu sollu
Fkn babblers man...