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Topic: Redox Reaction in chemistry  (Read 3361 times)

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Offline uniquereason

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Redox Reaction in chemistry
« on: March 04, 2010, 03:55:04 PM »
Which of the following are oxidation-reduction reactions?
Fe(s) + 2AgNO3(aq) → Fe(NO3)2(aq) + 2Ag(s)
Ni(OH)2(s) + 2HCl(aq) → NiCl2(aq) + 2H2O(l)
OH−(aq) + H+(aq) → H2O(l)
2NO2(g) → N2O4(g)
Ca(s) + 2HCl(aq) → CaCl2(aq) + H2(g)

I thought the answers would be
Yes
No
No
Yes
Yes
But I am way off somehow
Thank you and have a great week
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Offline Borek

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Re: Redox Reaction in chemistry
« Reply #1 on: March 04, 2010, 05:12:57 PM »
One of your answers is wrong.

Have you tried to assign xoidation numbers to see if they are changing?
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Offline uniquereason

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Re: Redox Reaction in chemistry
« Reply #2 on: March 04, 2010, 05:16:56 PM »
Yes I did for each of them and still no luck
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Offline sjb

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Re: Redox Reaction in chemistry
« Reply #3 on: March 04, 2010, 05:20:47 PM »
What then are the figures you have worked out?
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