Hey, guys! In today’s video I’m going to show you a few reactions with chlorosulfonic acid
which you may also call chlorosulfuric acid and that won’t count as a mistake
This superacid is much weaker and cheaper than fluorosulfonic acid.
In air, this acid fumes, forming the mist of sulfuric acid and hydrogen chloride.
If you heat this acid to the temperature above its boiling point,
it will form a much more poisonous compound called sulfur trioxide.
Just a tiny bit of chlorosulfonic acid is able to create a great amount of poisonous fume
Interacting with water, chlorosulfonic acid is hydrolyzed instantly and very violently,
which results in the formation of sulfuric acid and hydrogen chloride.
Also, during hydrolysis, a massive heat emission occurs.
I showed you a hydrolysis reaction filmed with thermal imager in one of my previous videos
Therefore if you pour this acid on ice, it will melt the ice quite intensively.
Let’s take a look at how an egg white will fold under the influence of various strong inorganic acids.
Here I’m adding a few drops of hydrochloric acid.
Then sulfuric acid.
Then nitric acid.
And, to top it all, a few drops of chlorosulfonic acid.
Take a look at the process of protein folding in slow-mo.
A spectacular reaction occurs when chlorosulfonic acid interacts with lithium aluminum hydride.
It is very nice to look at, especially in slow-mo.
Surprisingly, potassium does not explode on contact with chlorosulfonic acid.
As for other active metals, such as magnesium, they react with pure chlorosulfonic acid quite poorly.
However, adding just a little bit of water turns the reaction into a very violent one.
The reaction with tin proceeds violently, resulting in the formation of tin tetrachloride,
which is one of the liquids that emit the biggest amount of fume in air.
Selenium dissolves in chlorosulfonic acid giving a green solution,
which after a few hours or heating turns yellow.
The green colour is due to the formation of the Se8 cation.
The yellow colour is due to the formation of the Se4 cation.
Iodine dissolves slowly in chlorosulfuric acid to give a reddish-brown conducting solution.
When a small amount of potassium nitrate was treated with chlorosulfonic acid
a large amount of nitrogen dioxide was produced and chlorine gas was evolved.
Sodium chloride dissolves in chlorosulfonic acid with formation of sodium chlorosulfonate and evolution of hydrogen chloride.
It can be detected by the classic ammonia method,
although it’s quite difficult to distinguish the fume we’re looking for under such conditions.
Chlorosulfonic acid reacts violently with silver nitrate giving silver chloride and nitroxychlorosulfonate.
By the way, if you need to set filter paper on fire, you can use molten silver nitrate. It will do the job fairly quickly.
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