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Nickel dissolution (Acid/Base)

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Chemadian:
I'm doing a lab experiment on Nickel dissolution:

NiO + 2HCl + H2O --> NiCl2-2H2O.

This reaction is also in equilibrium with Fe, Co, Mg which react similarily with the chloride.
Even with a large concentration of Nickel and High Temperatures this reaction does not proceeds very quickly.  I'm not very familiar with catalysts and was wondering if anyone knew a good catalyst for these acid base reactions.

thanks,

Bob

jdurg:
What is the strength of the hydrochloric acid you are using?  If it's not a high molarity, the reaction will proceed slower since there isn't a lot of HCl to react with the nickel.  If you use a more concentrated acid, I'm pretty sure it will speed up a bit.   ;D

jkrumh1:
Make sure not to use too high of a concentration, otherwise it won't react at all.  

I think HCl stops working close to 12moles per liter (12 M) according to my teacher

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