Working out whether a redox reaction has happened, if so which elements have been red Watch

Kali5
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Hello,so for homework I have been given these equations to figure out: 1. Whether a redox reaction has occured and if so, which has reduced and which has oxidised.

Here are the following reactions:
1. NaOH + HCl = NaCl + H20
2. Mg + Cu2+= Mg2++ Cu

3. 2Fe + 3Cl2= 2FeCl3
4. 2Na + Cl2= 2NaCl

Am I correct in saying that only number 2 is a redox reaction? I'm doubting myself because i'm baffled as to why they would give me this homework when only 1 is a redox reaction?

Or is number 3 a redox reaction, where Fe has been oxidised (lost electrons) and Cl has been reduced (gained an electron)?
Thank you for any help
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BobbJo
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No. Apart from reaction 2, reactions 3 and 4 are also redox reactions.

Your reasoning for 3 is correct. Similar reasoning can be applied to 2 and 4.
Last edited by BobbJo; 3 months ago
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Kali5
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(Original post by BobbJo)
No. Apart from reaction 2, reactions 3 and 4 are redox reactions.

Your reasoning for 3 is correct. Similar reasoning can be applied to 2 and 4.
Ok, after looking at 4 again, Is it that Na has oxidised and Cl has reduced?
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BobbJo
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(Original post by Kali5)
Ok, after looking at 4 again, Is it that Na has oxidised and Cl has reduced?
Correct
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Kali5
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(Original post by BobbJo)
Correct
Ok great thank you so much!
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