Zn + Cu(NO3)2 -> Cu+Zn(NO3)2 Identify the spectator ions in the following reaction?

2016-05-06 8:39 am
I don't know what this means. The charge?
I'm so lost. My professor never taught us anything like this.

回答 (1)

2016-05-06 9:18 am
Spectator ions are the ions which do not take place in reaction.

The full equation of the reaction :
Zn(s) + Cu(NO₃)₂(aq) → Cu(s) + Zn(NO₃)₂(aq)

Write the equation in ionic form :
Zn(s) + Cu²⁺(aq) + 2NO₃⁻(aq) → Cu(s) + Zn²⁺(aq) + 2NO₃⁻(aq) ...... (*)

The ionic equation becomes :
Zn(s) + Cu²⁺(aq) → Cu(s) + Zn²⁺(aq)

From equation (*), NO₃⁻ ions do not take place in reaction.
Hence, NO₃⁻ ions are the spectator ions.


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