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Topic: Zinc dissolve in hydrochloric acid & nitric acid  (Read 8975 times)

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Offline delicate_tears

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Zinc dissolve in hydrochloric acid & nitric acid
« on: September 13, 2008, 09:18:14 AM »
Why does zinc dissolve in hydrochloric acid faster than if it's in nitric acid?

It is related to the transfer of electrons? Thanks heaps in advance =D.

Offline dabaichi

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Re: Zinc dissolve in hydrochloric acid & nitric acid
« Reply #1 on: September 13, 2008, 07:41:20 PM »
Logically thinking, zinc metal would release 2 electrons when it is in contact with HCl solution and HNO3 solution. Because Cl is more electronegative than NO3, Cl tends to react more violently when it feels the two electrons. Another explanation is that Cl is more easily reduced than NO3. This results in a faster rate of dissolving the zinc metal.

Offline Borek

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Re: Zinc dissolve in hydrochloric acid & nitric acid
« Reply #2 on: September 13, 2008, 07:45:52 PM »
Because Cl is more electronegative than NO3, Cl tends to react more violently when it feels the two electrons. Another explanation is that Cl is more easily reduced than NO3. This results in a faster rate of dissolving the zinc metal.

Care to elaborate? Both Cl- and NO3- are generally spectators here and they don't react with zinc, it is H+ that acts as an oxidizer.
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Offline Guitarmaniac86

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Re: Zinc dissolve in hydrochloric acid & nitric acid
« Reply #3 on: September 14, 2008, 07:49:34 AM »
Why does zinc dissolve in hydrochloric acid faster than if it's in nitric acid?

It is related to the transfer of electrons? Thanks heaps in advance =D.

Think about acid base equilibria.

Which one of the two dissociates more readily and why? There you will find your answer.

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