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All 5 posts Subject: Formic acid + Hydrogen peroxide= heat ? Please login to post Down

chemrat
(Stranger)
06-24-04 22:23
No 515213
      Formic acid + Hydrogen peroxide= heat ?

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
(Hive Addict)
06-24-04 22:30
No 515216
User Picture       performic acid

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.

Aztecunnilingus Maximus

psyloxy
(Hive Addict)
06-24-04 22:31
No 515217
User Picture       130 volumes ?

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

--psyloxy--

Sredni_Vashtar
(Hive Bee)
06-25-04 00:56
No 515241
      H2O2 Concentration vs. volume
(Rated as: good read)

You can interpolate from this table:

(130 volume is approx. 35%)

Sredni Vashtar went forth,
His thoughts were red thoughts and his teeth were white.

Rhodium
(Chief Bee)
11-03-04 14:30
No 539434
User Picture       Aqueous H2O2 Concentration vs. density / mp / bp
(Rated as: good read)

https://www.rhodium.ws/chemistry/pictures/h2o2.bp-mp-conc.chart.gif

https://www.rhodium.ws/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}

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	All 5 posts		Subject: Formic acid + Hydrogen peroxide= heat ?		Please login to post		Down


		chemrat (Stranger) 06-24-04 22:23 No 515213				Formic acid + Hydrogen peroxide= heat ?
						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 (Hive Addict) 06-24-04 22:30 No 515216				performic acid
						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. Aztecunnilingus Maximus



		psyloxy (Hive Addict) 06-24-04 22:31 No 515217				130 volumes ?
						Uhm, what's the strenght of the peroxide in % H2O2 by weight ? --psyloxy--



		Sredni_Vashtar (Hive Bee) 06-25-04 00:56 No 515241				H2O2 Concentration vs. volume (Rated as: good read)
						You can interpolate from this table: (130 volume is approx. 35%) Sredni Vashtar went forth, His thoughts were red thoughts and his teeth were white.



		Rhodium (Chief Bee) 11-03-04 14:30 No 539434				Aqueous H2O2 Concentration vs. density / mp / bp (Rated as: good read)
						https://www.rhodium.ws/chemistry/pictures/h2o2.bp-mp-conc.chart.gif https://www.rhodium.ws/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} ^{The Hive - Clandestine Chemists Without Borders}

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