Runninfarmer

This might be a dumb question but when solving ODE's with scilab and you set the independent variable points at which you want to evaluate, what is the middle number used for in t = 0:0.1:5 for the example: function dx = f ( t , x ) dx = sin (2 t ) ; endfunction t0 = 0 x0= -0.5 t=0:0.1:5; x = ode(x0, t0, t, f); plot2d(t, x) Here's the link for the example: http://scilab.in/files/workshops/15-04-2010-mumbai/sengupta-ode.pdf Thanks for the help!

I was wondering if anybody knew how titanium butoxide was synthesized? I didn't think just throwing titanium in butanol would work so does anybody have any info on that? I want to use it for synthesizing TiO2 spheres. Thanks!

If you have a solution that's a mixture of Magnesium salts (SO2-, Cl-, NO3-, F-) and then add any of one of the more reactive metal salts (CaCl, CaNO3, etc), which is going to be the most prominent Ca salt formed in a metathesis reaction? Is there a particular order to which anion is more stable with the more reactive metal? Thanks for the help

I'm trying to synthesize sodium aluminate from NaOH and old pop cans, but when the reaction goes it produces a dark gray solution, when it should theoretically be clear. Is this because of an impurity in the aluminum? Why do a lot of aluminum reactions like this produce dark, gray sludge? Thanks for the info.

Does separating the anode and cathode with an electrolyte bridge have any influence on what happens to the silver?

I was thinking about doing electrolysis of copper sulfate solution with a sterling silver anode and wondered what would plate out on the cathode? Will only copper plate out leaving behind silver anode sludge, or will the silver plate out on the cathode? Will a combination of the two plate out on the cathode? Thanks for the help

I found nothing in that thread about separating sodium chloride from sodium hydroxide in solution. Remember, I don't care about sodium metal, I want to produce sodium hydroxide by electrolysis of aqueous sodium chloride, since NaCl is so cheap and readily available. Maybe i missed something, but thanks.

I'm sorry if this has already been covered in any sodium making electrolysis threads, but I was wondering how I could separate the hypochlorous ion from the hydroxide produced, or prevent the hypochlorous ion from being produced? I would like to make some sodium hydroxide this way, but it seems as though the OCl- is a hurdle. Thanks for any help. Merged post follows: Consecutive posts mergedI guess I could have two chambers linked with a salt bridge, but then I would have a mixture of sodium chloride and sodium hydroxide in the cathode chamber. Is there a way to separate the salt from the hydroxide would be the better question? Thanks

So I bought ammonium phosphate monobasic, thinking it was just the ammonium phosphate to use as a fertilizer for algae growing. Then I realized it's the acid form and will lower the pH. Is there a way i can convert ammoium phosphate monobasic to just the ammonium phosphate itself? Or should I counteract the pH change with ammonium hydroxide? Thanks for any help

Hi, I was wondering if there was a cheap way to make 1-propanol from isopropyl alcohol, since IPA is so cheaply available? I'm making a catalyst and I need a primary alcohol and 1-propanol has the best properties for my procedure. Thanks a bunch for any help!

I'm a rookie when it comes to electronics, but I was wondering, if you have a 12kV rated capacitor and then you charge it with a 3 kV power supply, does the capacitor discharge at the rated voltage of 12kV or does it discharge at 3kV becasue that was what it was charged with? This is prolly a dumb question, but thanks for any info.

Sorry, this is a really late reply, but can you please explain the reactions involved with hydroquinone and sodium carbonate that lead to the O2 removal? i'm just curious, Thanks a bunch for the info!

I've heard the tanks store the hydrogen as hydrides, which means a bullet could pass through the tank and it wouldn't explode. You can store a whole lot more hydrogen too as oppossed to liquid hydrogen. United nuclear has some good info about it on their hydrogen conversion kit for cars page.

Thanks for the info!

I'm using a sealed presure vessel at about 300 degrees celsius. Actually, it could be aluminum, just got it off the internet. What's the best way to acquire phosphorus as an individual? I want the end result to be primarily liquid. Thanks for the info.

I'm running a reaction in an environment where I'd like to use a compound that removes oxygen from the total system. What would be the best economical, oxidizable compound, that doesn't corrode stainless steel and doesn't react with water? Thanks to anyone that can help!

I meant the bottom equation as being equation B

I think you just reverse the bottom equation (which changes the sign on the enthalpy) and then add it to the first equation. Then you cancel out reactants. I'm not fully sure if thats true but someonelse can follow me up on that,

So if I keep it running and stir it, all the Br2 produced will stay in soln and eventuallly collect towards the bottom? I was just worried some of the vapors would come out. Thanks for the info

I electrolyzed an aqueous solution of NaBr with a graphite anode and it appeared to be workin, but it was producing a yellowish color that was spreading throughout the solution. I was worrried that it was going to come out of soln. and into the air. Do you just have to run it longer so it starts to collect at the bottom or are you going to run into the hazard of fumes coming out of the soln. before it starts to collect?

Thanks iNow and thanks to anyone that has any good reactions

Hey big boy, I don't know what high horse you came riding on but I probably have more power supplies than you smart ass and this is my second year of college majoring in chemistry. This aint my first rodeo, I was just curious if there was ANY way to make something productive out of Magnesium sulfate since it's so readily available.

This may have shown up in another thread but is it possible to make sulfuric acid from magnesium sulfate?

My electronic skills are decent but not great, but two Physics professors and I tested moving the knobs and nothing happens. I guess I remember we found that a constant few tenths of a volt came out of the terminals, but didn't change when we messed with the knobs. There's a fuse in the back that I just replaced. The analog meter on the power supply doesn't work for the voltage or amperage. Thanks for the info.

I did some tests on it and I think the transformer is all right, but maybe somebody knows what could be wrong with it. It's a Sorensen QRD 60-1.5 and the power light comes on, but no power comes out of the terminals. I don't see any visible burn marks on any components on it. The circuit looks pretty complicated though.