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November 01, 2025, 11:57:12 am
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Author Topic: Redox reactions question  (Read 1038 times)  Share 

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Starlight

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Redox reactions question
« on: June 10, 2012, 07:50:13 pm »
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'Consider the reaction: Zn(s) + HCl(aq) ---> Zn2+(aq) + H2(g) + Cl-(aq)

Which species is the oxidant? (I thought Zn because it's reduced... but the answer says H+ why?)
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aznxD

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Re: Redox reactions question
« Reply #1 on: June 10, 2012, 07:54:00 pm »
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The oxidation state of Zn changes from 0 to +2
The oxidation state of H+ changes from +1 to 0
An increase in oxidation number is an oxidation, while a decrease is reduction.
Therefore H+ is undergoing reduction. Hence it is the oxidant
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Tonychet2

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Re: Redox reactions question
« Reply #2 on: June 10, 2012, 07:54:25 pm »
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Zn is being oxidised not reduced here
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Starlight

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Re: Redox reactions question
« Reply #3 on: June 10, 2012, 08:03:19 pm »
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Quote from: Tonychet2 on June 10, 2012, 07:54:25 pm
Zn is being oxidised not reduced here

Just realised, man I always get them mixed up :P
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ecvkcuf

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Re: Redox reactions question
« Reply #4 on: June 10, 2012, 09:47:59 pm »
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Just curious El, are you doing VCE Chem in Uni?
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Starlight

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Re: Redox reactions question
« Reply #5 on: June 10, 2012, 10:13:56 pm »
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Quote from: ecvkcuf on June 10, 2012, 09:47:59 pm
Just curious El, are you doing VCE Chem in Uni?

Yeah, chem fundamentals
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Comatose

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Re: Redox reactions question
« Reply #6 on: June 10, 2012, 10:14:25 pm »
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uhh silly question by what does oxidising agent mean? :D
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aznxD

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Re: Redox reactions question
« Reply #7 on: June 10, 2012, 10:15:50 pm »
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Quote from: Comatose on June 10, 2012, 10:14:25 pm
uhh silly question by what does oxidising agent mean? :D

The oxidant. So the compound being reduced/undergoing reduction.
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Starlight

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Re: Redox reactions question
« Reply #8 on: June 10, 2012, 10:18:35 pm »
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Quote from: aznxD on June 10, 2012, 10:15:50 pm
Quote from: Comatose on June 10, 2012, 10:14:25 pm
uhh silly question by what does oxidising agent mean? :D

The oxidant. So the compound being reduced/undergoing reduction.

and causes SOMETHING ELSE to be oxidised :P
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