Marmar10
  • Marmar10
Which of the following reactions would be classified as oxidation-reduction? Check all that apply. 2Na(s)+Cl2(g)→2NaCl(s) Na(s)+CuCl(aq)→NaCl(aq)+Cu(s) NaCN(aq)+CuCl(aq)→NaCl(aq)+CuCN(s)
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Photon336
  • Photon336
what do you think?
Marmar10
  • Marmar10
i thought it was the first one and last one but i got it wrong...
Photon336
  • Photon336
let's look at this more closely

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More answers

Photon336
  • Photon336
electrons have to be transferred from one element to the other, in the process of the reaction, so one is oxidized and the other is reduced.
Marmar10
  • Marmar10
how do you know Na doesnt have a charge?
Photon336
  • Photon336
@marmar10 interesting point, that might be where the point of confusion is. For your reference: "Any pure element—even if it forms diatomic molecules like chlorine (Cl2)—has an oxidation state of zero. Examples of this are Cu or O2." Na(s)+CuCl(aq)→NaCl(aq)+Cu(s) |dw:1443492397750:dw| Na goes from 0 to +1 so it's oxidized Cu goes from +1 to 0 so it's reduced. so electrons are lost from sodium and electrons are gained from copper.
Photon336
  • Photon336
i think your point of confusion was that any pure element has an oxidation state of 0
Marmar10
  • Marmar10
yes it makes a lot more sense now. I was looking in my book and it gave examples of ions so no wonder i was confused. Thank you
Photon336
  • Photon336
@Marmar10 no problem
Marmar10
  • Marmar10
weird the answer was the first and second one
Photon336
  • Photon336
|dw:1443493401499:dw|
Photon336
  • Photon336
ugh.. yeah.. technically the first one can be classified as oxidation reduction too.
Photon336
  • Photon336
Sodium goes from 0 to +1 and chlorine goes from 0 to -1
Marmar10
  • Marmar10
ok haha makes sense

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