# Oxygen gas produced by a Solid element + sodium hydroxide solution?

BenDover
TL;DR Summary
Solid element + sodium hydroxide solution = oxygen gas
Hello. I am wondering; which solid at room temperature elements produce oxygen gas when put into a solution of sodium hydroxide?

Thanks

sysprog
Summary:: Solid element + sodium hydroxide solution = oxygen gas

Hello. I am wondering; which solid at room temperature elements produce oxygen gas when put into a solution of sodium hydroxide?

Thanks
In general, oxidation relases energy (e.g. burning produces heat), and reduction requires energy (e.g. electrolysis of water produces hydrogen and oxygen).

Mentor
In general peroxides and superoxides often react with water producing oxygen. Not that they specifically require alkaline solution (they do produce hydroxides while reacting though).

sysprog
Homework Helper
Gold Member
There are no solid elements that will react with aqueous sodium hydroxide to produce oxygen.

sysprog
sysprog
@chemisttree, doesn't potassium perchlorate plus water produce potassium hydroxide plus oxygen?

Homework Helper
Gold Member
Potassium perchlorate is not an element. It is a compound.

sysprog
sysprog
Oops, I didn't read carefully enough ##-## I'd have thought that fact would go without saying.

chemisttree
snorkack
In general, what you need to produce oxygen from water is oxidants.
There is one free element oxidant consistently strong enough to react with water to produce oxygen, but it is gaseous at STP: fluorine. Chlorine is close, but also gaseous.
Strongest oxidizing element which is solid at STP is iodine, but it does not produce free oxygen in alkali solutions: it produces iodides and iodates.

sysprog
Mentor
In general, what you need to produce oxygen from water is oxidants.
The way I read it question is not about "producing oxygen from water" but about "producing oxygen in a reaction with water". If so, anything that decomposes in the presence of water producing oxygen fits.

sysprog
snorkack
The way I read it question is not about "producing oxygen from water" but about "producing oxygen in a reaction with water". If so, anything that decomposes in the presence of water producing oxygen fits.
Yes, but the only element that can decompose to oxygen is, well, oxygen.
It does have a second reasonably metastable allotropic form (ozone), but this is also a gas at STP.

sysprog
Yes, but the only element that can decompose to oxygen is, well, oxygen.
It does have a second reasonably metastable allotropic form (ozone), but this is also a gas at STP.
Water (with or without .1 M lye dissolved in it) can decompose into hydrogen and oxygen, but, as @chemisttree stated, oxygen is not released by introduction of a solid element to aqueous sodium hydroxide.

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