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Topic: formula of an insoluble salt  (Read 7523 times)

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Offline firedamage

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formula of an insoluble salt
« on: February 21, 2009, 12:55:25 AM »
in what condition Cu2+(aq) + 2I-(aq) =CuI2(s)??
and in what condition 2Cu2+(aq) +4I-(aq)=2CuI(s)+I2(s)?
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Offline Borek

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Re: formula of an insoluble salt
« Reply #1 on: February 21, 2009, 05:27:20 AM »
You may have to consult Nernst equation to check at what concentrations iodide is able to reduce copper (taking CuI precipitation into account).
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Offline firedamage

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Re: formula of an insoluble salt
« Reply #2 on: February 21, 2009, 09:01:10 PM »
is it Cu2+(aq) + 2I-(aq) =CuI2(s) is not stable so it decompose into
2Cu2+(aq) +4I-(aq)=2CuI(s)+I2(s)?
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Offline AWK

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Re: formula of an insoluble salt
« Reply #3 on: February 23, 2009, 01:26:11 AM »
Quote from: firedamage on February 21, 2009, 09:01:10 PM
is it Cu2+(aq) + 2I-(aq) =CuI2(s) is not stable so it decompose into
2Cu2+(aq) +4I-(aq)=2CuI(s)+I2(s)?
This reaction proceeds immediately in water solution at room temperature
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