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Topic: What is the best way to purify CoCO3?  (Read 2006 times)

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Offline luishdg12

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What is the best way to purify CoCO3?
« on: October 30, 2019, 05:19:54 PM »
Right now I´m trying to purify CoCO3 using recrystallization but I´m having trouble finding the best solvent.
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Offline AWK

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Re: What is the best way to purify CoCO3?
« Reply #1 on: October 30, 2019, 06:14:21 PM »
There is no solvent for cobalt carbonate. You just have to use the maximum pure cobalt salt and precipitate the cobalt carbonate in a neutral environment (carbonates excluded because of precipitation basic cobalt carbonate). In this way, you may obtain CoCO3·4H2O from the aqueous solution.
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Offline Borek

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Re: What is the best way to purify CoCO3?
« Reply #2 on: October 31, 2019, 04:24:35 AM »
Technically water is a solvent.
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Offline Covek

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Re: What is the best way to purify CoCO3?
« Reply #3 on: November 27, 2019, 03:02:13 PM »
I have dissolved CoCO3 in HNO3 and precipitated with NaHCO3 in solution. I had to heat up solution to 80 C to get close to quantitative precipitate.
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