How to Make Sodium Hydroxide


Introduction: How to Make Sodium Hydroxide

These are the thing you need to make sodium hydroxide
any type of container 
2 carbon electrodes (you can get these from zinc-carbon batteries)
alligator clips
salt (non iodized salt)
power source (i used a 9v battery) 

This is my 2nd instructable so dont expect it to be good

Step 1:

First you need to get water and put it in a container then mix salt (sodium chloride)  in it (make sure the salt isn't iodized)

Step 2:

Next put the 2 carbon rods in the water and then apply power 
(do this for about 7 hours then let the rest evaperate)

Step 3:

you are electrolyzing the salt water solution and the sodium chloride is breaking up into sodium and chlorine (warning this is giving of chlorine gas)

He is what is going on
2NaCl(aq) + 2H2O(l) => H2(g) + Cl2(g) + 2NaOH(aq)



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    Smells like sodium hydroxide but is it possible with nacl i think making sodium hydroxide is only possible by using sodium carbonate

    or...more precisely, a mix of sodium chlorate and perchlorate.

    1 reply

    Or would it be a mixture of perchlorates, chlorates, and hypochlorite?

    you can use it to dissolve glass and lots of other stuff

    Sorry, but your not going to dissolve glass with just sodium hydroxide.

    It will dissolve glass if the sodium hydroxide is heated to its melting point.... And eventually destroy tue container you are hearing it in

    You can use it to make traditional german pretzels, or soap, or (assuming you've obtained nearly 100% pure NaOH) you can perform an acid-base titration to (almost perectly) calculate the exact number of the molecules of a certain acid in almost any solution you'd like to know (using an indicator such as phenolphthalein)(and a graduated burette)(and a very very accurate scale, maybe accurate to like 6 to 7 significant figures)(basicly just need access to your college's chemistry lab)

    you can also usee it to neutrolize HCl thet hets formt when Cl hit water (H2O).
    it will then turn Cl back into NaCl and water

    You can use it to make soap.

    For the love of god....don't treat that powder as sodium hydroxide!! ITS NOT!! Thats perchlorate! and its a great oxidizing agent.

    1 reply

    Industrially, sodium chlorate is produced by the electrolysis of a hot sodium chloride solution:[6]

    NaCl + 3 H2O → NaClO3 + 3 H2:

    This reaction progresses in heat (at least 70 degrees Celsius), and controlled pH. In lower temperature or with high pH another reaction progresses: 2 NaCl + H2O → NaClO + NaCl + H2

    The Chloralkali process is an industrial process for the electrolytic production of sodium hydroxide and chlorine.

    !!!It can also be synthesized by passing chlorine gas through a solution of sodium hydroxide. (which is what you are doing here) It is then purified by crystallization.!!!

    - Wiki

    Interesting, thanks for sharing.

    Why is there an arduino? No functionality whatsoever related to it.

    What is with the arduino? If your setup draws too much amperage can't that be damaged? A wall wart or old PC power supply might would work good and you wouldn't risk damaging anything.