Redox - Potassium Dichromate VI gets reduced

Watch Potassium Dichromate VI turns from orange to green in the presence of a reducing agent, iron (II) sulfate.

Reaction:
Cr6+ ions (orange) are reduced to Cr3+ ions (green).
Fe2+ ions are oxidized to Fe3+ ions.

Category:

Education

Tags:

• Redox
• Oxidising
• agent
• reduction
• chemistry
• Potassium
• Dichromate

[elliotmotocross]

Whats the point of that?

[linglee0311]

well, to observe the colour change in KMNO4 in presence of a reducing agent =)

[98JMA]

@ReapingMiner

You may wish just to purchase a small quantity, it is a very versatile and interesting chemical, handled correctly. As long as you work outside with a fan blowing a gentle airstream across your work surface, you wear goggles, gloves and a cheap disposable respirator, you should be fine. Just avoid getting it on your skin, and, primarily, inhaling dusts of it.

[ReapingMiner]

@98JMA IDD, i was like: "no gloves? whaaaaaat?"

I mean i really want to make and crystallize some K2Cr2O7 but i wont because of the danger for my health..... And we are not allowed to work with that chemical on the laboratory w/o special reason to.

[98JMA]

You must wear gloves with K2Cr2O7.

[iTszTeddy]

@Edd360 LOOOOOOOL Nahh nigga that mother fucker is reducing thaat ting;

Say Nizzy.

[Edd360]

yo that potassium dichromate got the FUCK oxidised outta it nigga

[ShakespeareRocky]

Qn: If Fe2+ is oxidized to Fe3+, wouldn't there be a colour change from pale green to brown?

So why did the potassium dichromate VI turns green in colour?

[stevenliang96]

@ciaoiosonoio yes, technically potassium dichromate should be treated as a carcinogenic agent.

[Danielst16]

Potassium Dichromate VI is the best coloured chemical I've used in my Chemistry so far, we were oxidising alcohols with it and it was such an awesome orange colour. The way we did it though was to add the acid catalyst to the alcohol and water to start with and then add the oxidising agent through a reflux condenser drop wise. It was an opaque colour as well not transparent like in this video so the colours were a lot more intense. Great video, thanks.

[ciaoiosonoio]

Potassium dichromate is carcinogenic!

Using it without gloves will help your health -_-

[bradyexplains]

@linglee0311 potassium dichromate has the formula K2Cr2O7.

KMnO4 is potassium permanganate