Formic acid + Hydrogen peroxide= heat ?

[chemrat]

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]

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]

Uhm, what's the strenght of the peroxide in % H2O2 by weight ?

--psyloxy--

[Sredni_Vashtar]

You can interpolate from this table:

https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000515213-pic01a.gif" target="_blank" title="View this image">

(130 volume is approx. 35%)

[Rhodium]

https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000515213-file_uun2.gif" title="View this image">

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

https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000515213-file_uun2.gif" title="View this image">

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

https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000515213-pic11a.gif" target="_blank" title="View this image">

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}