October 05, 2022, 07:41:59 AM
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Topic: How to delay change of color of a reaction?  (Read 211 times)

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Offline Illusionist

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How to delay change of color of a reaction?
« on: September 25, 2022, 03:56:28 PM »
Hello, i am not a chemist, so sorry for the noob question.

If i mix Iron(III) chloride and potassium thiocyanate, the reaction should produce immediately a red liquid, correct?

How can i do to retard the change of color (for example after 60 seconds of mixing them)?
« Last Edit: September 25, 2022, 04:59:37 PM by Illusionist »

Online Borek

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Re: How to delay change of color of a reaction?
« Reply #1 on: September 25, 2022, 07:06:58 PM »
You were already told there are no simple tricks that can do that, if you hope to get a different answer you are out of luck. Chemistry won't change just because you will ask again.
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Offline Illusionist

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Re: How to delay change of color of a reaction?
« Reply #2 on: September 26, 2022, 09:33:50 AM »
My question is different from the other (the ingredients are completely different), and by the way, some kind of clock reactions CAN be delayed (the coloration), by simply adding distilled water.

This is why it's called "Clock reaction". Am i correct?

I am asking if, with this reaction too, is possible to do the same, in some way.

Have a nice day

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Re: How to delay change of color of a reaction?
« Reply #3 on: September 26, 2022, 03:35:55 PM »
My question is different from the other (the ingredients are completely different), and by the way, some kind of clock reactions CAN be delayed (the coloration), by simply adding distilled water.

It is not that simple. If you add water in some cases you can slow the reaction, but you will also end with a weaker color. Or no color at all. There is plenty of fine prints here.

Quote
This is why it's called "Clock reaction". Am i correct?

Nobody uses these reactions to measure time, this is a rather lousy and catchy name that doesn't mean much.

Quote
I am asking if, with this reaction too, is possible to do the same, in some way.

No.

Technically there is nothing that makes process that will produce effect you need impossible, but I am not aware of any reasonably simple reaction that can be done with reasonably cheap and available reagents. Apparently others don't know such reactions too.
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Offline Illusionist

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Re: How to delay change of color of a reaction?
« Reply #4 on: September 27, 2022, 08:39:13 AM »
Thanks for the reply.

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