Author Topic: Formic acid + Hydrogen peroxide= heat ?  (Read 2726 times)

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chemrat

  • Guest
Formic acid + Hydrogen peroxide= heat ?
« on: June 25, 2004, 12:23:00 AM »
Hi !!
Reading the documentation about the performic reaction I've tried to understand that Hydrogen peroxide and formic acid have to be mixed well about an hour before the reaction, and that mixing cause heat.

This is a problem for me, because I've tried but the liquid don't warms up.

My formic acid is reagent-grade 99% purity and hydrogen peroxide is
a industrial product for bleaching the wood, is 130 volumes and should
work well according to Eleusis.

I have mixed the reagents  with a magnetic stirrer for two hours but nothing
happens. Somebody know more ?


GC_MS

  • Guest
performic acid
« Reply #1 on: June 25, 2004, 12:30:00 AM »
Don't worry, the reaction is not that exothermic. If you make small quantities of performic acid solution, it is absolutely normal that no temperature change is noticed.

Adding the performic acid to an alkene on the other hand, will most definitely result in an exothermic reaction.

After a few hours, you will notice gas bubbles in your performic acid solution as well. But it will remain colorless.


psyloxy

  • Guest
130 volumes ?
« Reply #2 on: June 25, 2004, 12:31:00 AM »
Uhm, what's the strenght of the peroxide in % H2O2 by weight ?

--psyloxy--

Sredni_Vashtar

  • Guest
H2O2 Concentration vs. volume
« Reply #3 on: June 25, 2004, 02:56:00 AM »
You can interpolate from this table:



(130 volume is approx. 35%)


Rhodium

  • Guest
Aqueous H2O2 Concentration vs. density / mp / bp
« Reply #4 on: November 03, 2004, 03:30:00 PM »

https://www.thevespiary.org/rhodium/Rhodium/chemistry/pictures/h2o2.bp-mp-conc.chart.gif




https://www.thevespiary.org/rhodium/Rhodium/chemistry/pictures/h2o2.density-conc.chart.gif





Reference:

H2O2.com - Physical and Chemical Properties of Hydrogen Peroxide

(http://www.h2o2.com/intro/properties.html)

H2O2 conc/density:

Post 243407

(lugh: "Hydrogen Peroxide Concentrations/Density", Novel Discourse)


Keywords: Hydrogen Peroxide H2O2 Concentration Charts Density melting point boiling point correlation solid liquid phase diagram