Sodium Hydroxide solution
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Sodium Hydroxide solution
My sodium hydroxide has liquefied and I was wondering how to make up a rough solution for junior chemistry. 1M ish
- Labbie
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Re: Sodium Hydroxide solution
Can you dilute down perhaps... We use to have silca gel the packets you get with your shoes and things. Cling wrap on top of the chemical with a silca gel pack on top of the glad wrap. screw the lid down and turn the cling wrap up over the lid. Seemed to keep a little longer, that is with the solid sorry.
Regards Labbie
Lab Manager/Lab Tech, mind reading etc etc
Now retired
Lab Manager/Lab Tech, mind reading etc etc
Now retired
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Re: Sodium Hydroxide solution
My advice: send it off for disposal and buy fresh. Solid NaOH is not expensive. You will have no way of knowing the strength, even for juniors.
- Labbie
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Re: Sodium Hydroxide solution
Yes but perhaps you can dilute a 2m down for 1m .
Regards Labbie
Lab Manager/Lab Tech, mind reading etc etc
Now retired
Lab Manager/Lab Tech, mind reading etc etc
Now retired
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Re: Sodium Hydroxide solution
Did I misread? I got the idea that the solid had liquified. I think you're idea of sealing it with the silica sachet would be a great idea to prevent, but even ensuring the lid is on tightly can help (depends where you are in terms of humidity).
- MissKat
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Re: Sodium Hydroxide solution
If you really want to, could make a dilute solution of known volume and titrate it against a primary standard. But as Merilyn mentioned, much easier to buy a new bottle
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Re: Sodium Hydroxide solution
You can buy a jar of caustic soda from the supermarket . On the label it says "cleans drains faster" ....just say'n
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Re: Sodium Hydroxide solution
It's a liquid now. Which is unusual for this as we use so much. I think covid lock down might be the cause. All those common chems left unused for a year. Can't afford the delivery for 1 jar and I can use it for cleaning as it doesn't need to be collected as chem waste. I will probably use it for pH columns then. We used to make "bucket strength" which was an unknown strength but very dilute, common chemical that juniors used stacks of that didn't need to be analytical, but auditors don't like that. LOL And thanks for the idea of silica sachet. I will also check out drain cleaner some of which have other stuff in them I've noticed.
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Re: Sodium Hydroxide solution
Sorry I may have been a bit cryptic. I was suggesting you can just tip it down the drain ( with the tap running ) rather than pay for waste disposal of it.
We just use Plain Caustic Soda from the Supermarket here .It is just Sodium Hydroxide .
Not sure about Draino or CLR, I think they have other crap in them .