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Posts posted by ercdndrs

  1. If H2O2 is a stronger oxidiser than bromine (I'm not sure it is)you could do the following.

    We'll assume you're using sodium bromide.


    1) add HCl to an aqueous solution of NaBR so you have:

    Na+, Cl-, H+, Br-

    in solution


    2) add H2O2 to the solution. The peroxide will oxidise the H+ to H2O and Br- will turn to Br2.

    Bromine will form over chlorine because it is a weaker oxidising agent.

  2. I don't so much have any special use for the hydrazine sulfate; I just think the reaction would be interesting and good practise. In any case I could just sell the product on ebay or something. I do have acess to a large backyard, and yes I am aware of the toxic fumes. Obviously I wouldn't be trying this on a large scale, but something small just for curiosity's sake.

  3. Hey all,


    So I am looking to make some hydrazine sulfate through the ketazine process. However, I don't have acess to the ideal ingredients so I am wondering if my subsitutions would work:

    65%Calcium hypochlorite powder susbtituted for NaClO solution

    10% concentrated ammonia

    acetone instead of 2-butanone


    I would carry out the reaction with excess ammonia and then distill off the dimethyl ketazine from the solution before reacting it with sulfuric acid to get hydrazine sulfate.


    Are there any problems with this?


    Thanks in advance!

  4. Hello All,

    I'm also interested in making nitric acid. I do have ammonium nitrate and sulfuric acid, but my acid is very impure (buffering agents and colliodal carbon).

    So, I am thinking of trying this alternate route, requiring few special materials (get ammonium nitrate from disposable cold packs):


    1) Electrolyse ammonium nitrate solution with copper anode:

    2 NO3- + Cu(s) - 2e = Cu(NO3)2(aq)

    2 NH4+ + 2 H2O + 2e = H2(g) + 2 NH4OH(aq)

    NH4OH(aq) =NH3(g) + H2O


    2) Electrolyse again with graphite electrodes:

    2 Cu(NO3)2(aq) + 2 H2O = 2 Cu(s) + 4 HNO3(aq) + O2(g)


    As far as I know copper will only react with concentrated or hot oxidising acids. I know sulfuric acid can be prepared in the same way as step 2 from copper (II) sulfate, so I am wondering if nitric acid can be produced this way and if this process will work in general.


    Are there any problems with anything I've done here?



  5. Hey all, I am considering making a cell for the production of perchlorates, and I am stuck on finding a suitable material for my anode. Obviously I need something that is conductive but won't react with the chloride/ up to perchlorate ions present during electrolyis. I do have carbon (graphite) electrodes but I've read they are messy and are slowly eaten away. Platinum is always an option but it is expensive, so I am wondering if I can just use nickel or a nickel based alloy instead?


    Thanks :)

  6. Unfortunately I can't accurately answer your questions, but I have some things I'd like to point out.


    1. If you want to do this efficiently/ inexpensively, batteries aren't the gratest choice. I use a car battery charger, preferrably with a low (~2V) voltage/high current setting.


    2. make sure you use an inert anode, or you'll have a metal sulfate, magnesium hydroxide, and H2 gas forming instead of H2 and O2.

  7. The iron will decompose the peroxide to water and oxygen gas, which will bubble up, though some will dissolve in the water and make the iron rust. I don't know what you have the sodium chloride in there for but I doubt it will do much.

  8. Looking for a simple and straightforward answer to a question of the same type :)


    I'm trying to make hydrochloric acid from NaCl and H2SO4. When I added them together (acid was ~94% conc.) the result was hot, foamy acid everywhere and hydrochloric acid fumes filling the room.


    I'd like to keep my HCl dissolved so I can practically distill it. Does this happen or does sulphuric acid force the HCl out of solution?

  9. Yes, if you evaporate it you'll get some ammonium chloride but mostly you'll get table salt because of all the baking soda you added.


    ( NaHCO3 + HCl -> NaCl + H2O + CO2)


    If you want pure ammonium chloride you're best off buying some PH indicators, or test for acidity by taking a small sample out (so you don't contaminate your product) and add ammonia until the solution is very slightly acidic (ammonium chloride in solution is mildly acidic). You'll need a lot of ammonia cleaner because it's only something like 3% ammonia, the rest being water

    Merged post follows:

    Consecutive posts merged

    Edit: nvm, I read your procedure wrong, yes you can get the NH4Cl by evaporating, but you won't get much. It'd be much more efficient if you didn't waste your HCl by testing the solution.

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