And then you turn around your supervisor is watching you, with a dissapointed look on his/her face. Then you spend 20 minutes neutralizing and cleaning the fume hood...
@alecjw1 You've got it backward in the first example, it's an excess of acid to peroxide. More peroxide or a higher strength = more chance of it exploding on contact with organic solvents and tars
@Amy4Birds piranha solution is a (very dangerous) mixture of concentrated sulphuric acid and peroxide that chemists use to clean glassware (when it's refusing to clean with concentrated acids / bases / solvents alone) and that physicists use to clean silicon wafer as per the protocols. It's not necessary for most people to make it. The staff in some departments aren't allowed to without being okayed by the risk assessment people. It can spit, splash, boil and explode on contact with organics.
This should be under TVTropes: Hollywood Acid.
Biospark88 4 months ago
And then you turn around your supervisor is watching you, with a dissapointed look on his/her face. Then you spend 20 minutes neutralizing and cleaning the fume hood...
nucleochemist 1 year ago
Yep, that one's a lot more impressive than the drips on the tissue. Are those PTFE tweezers? Lucky you. Nice gloves. I have the bright green ones.
lexichronicle2 1 year ago
either 1 part h2so4 @ 97% conc and 2 parts h2o2 @ 30% conc
or 2 parts h2so4 and 1 part h2o2
forgotten which, sorry
alecjw1 3 years ago
@alecjw1 You've got it backward in the first example, it's an excess of acid to peroxide. More peroxide or a higher strength = more chance of it exploding on contact with organic solvents and tars
lexichronicle2 1 year ago
Cool! What, pray tell, is piranha solution. Dumb question coming up. Is it derived from the fish of the same name?
Amy4Birds 3 years ago
@Amy4Birds piranha solution is a (very dangerous) mixture of concentrated sulphuric acid and peroxide that chemists use to clean glassware (when it's refusing to clean with concentrated acids / bases / solvents alone) and that physicists use to clean silicon wafer as per the protocols. It's not necessary for most people to make it. The staff in some departments aren't allowed to without being okayed by the risk assessment people. It can spit, splash, boil and explode on contact with organics.
lexichronicle2 1 year ago