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 Post subject: Chromium Oxide plus Potassium HydroxidePosted: Wed, 23 Nov 2011 12:51:35 UTC
 S.O.S. Oldtimer

Joined: Wed, 10 Dec 2003 23:11:07 UTC
Posts: 156
Location: Arbroath, Scotland
I am attempting to balance an equation and am having no luck. Could you help please?
Chromium Oxide added to Potassium Hydroxide to obtain the salt.

My attempt:

CrO3 + KOH = Cr(OH)3 + K2O

Thanks
Sandi

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Sandi Forrester

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 Post subject: Re: Chromium Oxide plus Potassium HydroxidePosted: Wed, 23 Nov 2011 15:18:02 UTC
 Moderator

Joined: Mon, 29 Dec 2008 17:49:32 UTC
Posts: 6009
Location: 127.0.0.1, ::1 (avatar courtesy of UDN)
Sandi wrote:
I am attempting to balance an equation and am having no luck. Could you help please?
Chromium Oxide added to Potassium Hydroxide to obtain the salt.

My attempt:

CrO3 + KOH = Cr(OH)3 + K2O

Thanks
Sandi

Check the formula for chromium oxide.

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 Post subject: Re: Chromium Oxide plus Potassium HydroxidePosted: Thu, 24 Nov 2011 16:47:06 UTC
 S.O.S. Oldtimer

Joined: Wed, 10 Dec 2003 23:11:07 UTC
Posts: 156
Location: Arbroath, Scotland
Hi Moderator,
My formula for Chromium Oxide is given as Cr (VI) O3.

Sandi

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Sandi Forrester

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 Post subject: Re: Chromium Oxide plus Potassium HydroxidePosted: Thu, 24 Nov 2011 17:13:25 UTC
 Moderator

Joined: Mon, 29 Dec 2008 17:49:32 UTC
Posts: 6009
Location: 127.0.0.1, ::1 (avatar courtesy of UDN)
Sandi wrote:
Hi Moderator,
My formula for Chromium Oxide is given as Cr (VI) O3.

Sandi

There is no redox here, so if you start with chromium(VI) you will be left with chromium(VI), not chromium(III).

Actually, you will probably be left with potassium chromate(VI)/dichromate(VI), depending on how much potassium hydroxide you start with.

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 Post subject: Re: Chromium Oxide plus Potassium HydroxidePosted: Thu, 24 Nov 2011 19:23:59 UTC
 Senior Member

Joined: Tue, 16 Aug 2011 23:38:56 UTC
Posts: 124
Quote:
I am attempting to balance an equation and am having no luck. Could you help please?
Chromium Oxide added to Potassium Hydroxide to obtain the salt.

My attempt:

CrO3 + KOH = Cr(OH)3 + K2O

equation CrO3+KOH=Cr(OH)3+K2O is an impossible reaction

http://www.webqc.org/balance.php?reacti ... KCrO4%2BH2

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 Post subject: Re: Chromium Oxide plus Potassium HydroxidePosted: Sat, 26 Nov 2011 14:40:47 UTC
 S.O.S. Oldtimer

Joined: Wed, 10 Dec 2003 23:11:07 UTC
Posts: 156
Location: Arbroath, Scotland
I think now that it may have been a typo. in the question.

Sandi

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Sandi Forrester

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 Post subject: Re: Chromium Oxide plus Potassium HydroxidePosted: Sat, 26 Nov 2011 15:59:35 UTC
 Moderator

Joined: Mon, 29 Dec 2008 17:49:32 UTC
Posts: 6009
Location: 127.0.0.1, ::1 (avatar courtesy of UDN)
Sandi wrote:
I think now that it may have been a typo. in the question.

Sandi

There is no typo in the question. You need to be able to recognise what "the salt" is, and it certainly isn't the alkali chromium(III) hydroxide.

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