Did the NaOH not corrode the glassware? Anytime I use hot NaOH in a glass container it eats through part of the glass, eventually destroying it if used several times. I have even dissolved whole test tubes in a more pure, hot solution.
What temperature did you set the heating mantle into? Does it really need to be boiled? Because based on ASTM, it's said that we only need to dissolve the NaOH in water, without heating.
In fact "crashing" out the crystals in a short ammount of time increseases the purity of your NaOH. Thats because you dont allow for impurities to be trapped inside the crystal as it slowly forms. With that said, the small crystalls created will be quite hard to filter.
Quite the opposite is true. Less inclusions (containing impurities) are formed when the crystallization occurs slowly. The crystal lattice is better able to exclude foreign material when it forms slowly.
Charleschidsey is correct. Slow is better not fast. Rapid cooling allows impurities to be trapped and "wrapped" in the forming crystals which do not give time for the impurity to fall away. In a slowly cooled solution, the impurity will not be able to find a place to stick into the crystal lattice and instead fall away while the pure crystal slowly grows
Great video. Couldnt you check the melting point for purity? And did you dry the crystals via oven or dessication chanber to make them anhydrous? NaOH is pretty hygroscopic, so itll be wet if you dont. P.S. if you want to use spectroscopy, check out this DIY vid: ruclips.net/video/pIk8I10ZmYY/видео.html
Nice! I don't know why I'm only seeing this now, and I hope you haven't quit making videos. Good chemistry content is hard to find on RUclips.
Did the NaOH not corrode the glassware? Anytime I use hot NaOH in a glass container it eats through part of the glass, eventually destroying it if used several times. I have even dissolved whole test tubes in a more pure, hot solution.
use lab-grade flasks instead of cheap ones, they should not corrode or dissolve!
@@sam.f3002 Glass of any kind other than fuzed quartz will be eroded by hot NaOH.
lol "the reason I am not using a scale is because it recently ran out of battery"... eight out of eight mate.
What temperature did you set the heating mantle into?
Does it really need to be boiled? Because based on ASTM, it's said that we only need to dissolve the NaOH in water, without heating.
Can aluminum hydroxide crystallize?
In fact "crashing" out the crystals in a short ammount of time increseases the purity of your NaOH. Thats because you dont allow for impurities to be trapped inside the crystal as it slowly forms. With that said, the small crystalls created will be quite hard to filter.
Quite the opposite is true. Less inclusions (containing impurities) are formed when the crystallization occurs slowly. The crystal lattice is better able to exclude foreign material when it forms slowly.
Charleschidsey is correct. Slow is better not fast. Rapid cooling allows impurities to be trapped and "wrapped" in the forming crystals which do not give time for the impurity to fall away. In a slowly cooled solution, the impurity will not be able to find a place to stick into the crystal lattice and instead fall away while the pure crystal slowly grows
Thank you
can i heat it in oven or just put it in steel container and heat it up to remove all water and get anhydrous NaOH?!?!
+mattibboss That may remove a lot of water however NaOH is extremely a hygroscopic so it will be quite hard to get to completely anhydrous.
wash it in acetone to dry it, man.
Great video. Couldnt you check the melting point for purity? And did you dry the crystals via oven or dessication chanber to make them anhydrous? NaOH is pretty hygroscopic, so itll be wet if you dont.
P.S. if you want to use spectroscopy, check out this DIY vid: ruclips.net/video/pIk8I10ZmYY/видео.html
with water :O !?!?
HackanHacker what's wrong with water?
No way dude
.... No way what?
Next crystallise meth-amphetamine
Oh wait... I don't think that was copper sulphate...