Potassium Hexacyanoferate Solution

[chemical]

I recently posted asking anyone about Corrision solution. I have recently taken over at a NSW high school.
The chemicals are all sorted to regulations. And for the life of me I cant find the Postassium Hexacyanofeerate solution, Does anyone know what catergory it might be under.

I need to make some corrisve solution for a corrision experiment in year 9 Science tracks with nails.copper etc.

The chemical side is my challage.

Recently several staff moved a lot of equipment from one part of the school to the main science block. But no one logged where the stuff was so you guessed it a mess. It takes a long time to find equipment. So I am now going through the rooms and store rooms to allocate every item.
I dont know where to start.

[Labbie]

Hi, Potassium Hexacyanoferrate III or II???????????, is know in the CSIS page 202 as Potassium Ferricyanide, it is a Red powered. You will need to know if it is III or II, most important. It is Non Classified chemical. safe to use with 7-12 years, so will have a green dot on the bottle. It should be stored in the Non Classified system in Alph order. Good Luck

Regards

[J]

Hi Chemical

Potassium Hexacyanoferrate (II) is also called Potassium Ferrocyanide. Potassium Hexacyanoferrate (III) is Potassium Ferricyanide. Does that help? I have never used it before.

Julie

[Robb]

Hi Chemical,

I think we are on the right track for your chemical,

Potassium Ferricyanide is a solid chemical that requires to be made up into a solution.

Usually for the experiment that you wish to perform the solution would be made up as a Saturated Solution.

This means that if you require 500mLs of the solution you can fill a beaker with this amount of water and add (with constant stirring) enough Potassium Ferricyanide until no more will dissolve.

You probably can’t find the chemical as a solution because it has to be prepared as a liquid first.

Potassium Ferricyanide is a Class 9 Chemical - this means it falls under the category of a Miscellaneous Dangerous Good.

I hope this helps in your answer.

Cheers,

Robb.....

[Alice]

Hi Chemical

We use Potassium ferricyanide (Potassium hexacyanoferrate) as a rust indicator. Not sure if this is what you want?

We use a 0.1M solution, made up from powder.

The colour changes from yellow/green to blue in the presence of rust. The students rust a nail in salt water in a test tubes and then add a few drops of indicator to the water. It turns blue.

I hope this is of some help.

Alice

[lada]

This is promuch to late, but we use the method in Track 9 and works very well. Make the agar solution with pot. hexacyanoferrate(III).
Good luck,
Lada

[Ocean Breeze]

The formula of the one you want is K3 Fe (CN)6
Potassium Ferricyanide.
Its also known as Potassium Hexacyano Ferrate III

The solid is a deep rusty orange crystals..(reminds me of sherbet). (as opposed to the ferrocyanide , which is pale yellow)

Just make up a solution of a nice rich colour.
When added several drops to the test tube, it will start off pale yellow-----> then turn blue at the rusting site(to indicate)----------------------> then will clear again as the K3 Fe (CN)6 is used up.
Hope this helps.