UK Pyrotechnics Society Forums: CCH Concepts - Viewing Profile - UK Pyrotechnics Society Forums

hey all

im working on a spreadsheet for work.

I calculating how much of a metal will be dissolved in the presence of an acid, that's the easy part.

what im struggling to find is the formulae to calculate how long a reaction will take, given know surface area, molar of acid, type of acid and metal, temperature etc.

any suggestions?

i was just reading about using the molar mass and valance to work out strochiometic rations. i was working through some examples but was a cant find is how to calculate the valances of molecules.

for instance KClO4 has a valance of -8, NH4NO3 has a valance of -2, i know this because these values were provided, but how are they calculated? and what about for more complex fuels like heximine etc?

Hello All

I was reading something the other day about the chemistry behind fulminates.

this raised a concern for me.

from my understanding a metal fulminate is sythisised by dissolving a metal in nitric acid and then mixing the metal nitrate with ethanol and the crystals filtered off would be a metal fulminate. these fulminates cant be very nasty stuff.

my concern came when i was thinking about construction of some stars. if the star has a metal nitrate in it and ethanol was used as a solvent in the binding. could a metal fulminate be produced?

if so this would make a relatively harmless star quite dangerous would it not?

hey everyone.

im working in Ohio for the next few weeks. i was discussing our hobby with a colleague and he has access to open land, has a fire arms licence and was interested in going through a few experiments

does any know the legal issues out here? i certainly don't want to end up on the wrong side of the law out here as a guest.

also i was wondering if there are any local members and how to get some small quantities of chemicals out here if i can experiment.

Hello All

its been a long time since I have posted on the site, mainly because my new job has been keeping me very busy.

this new job brings me to the reason I am posting.

I am now working as a forensic engineering consultant for a global company setting up there UK office, I am currently extending our expert panel.

I mentioned the UKPS and the level of expertise that can be found here.

so to my question, if there anybody here that has a chemistry back ground to the level of an "expert", this may mean doctorate level or considerable industry experience. the bench mark is have you given evidence in court before as a expert or are you capable of doing so.

please contact me and send me a CV if you feel this is something that may apply to you.

( if this should be posted on a different forum please let me know)