Chemical Forums
Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: luishdg12 on October 30, 2019, 05:19:54 PM
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Right now I´m trying to purify CoCO3 using recrystallization but I´m having trouble finding the best solvent.
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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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Technically water is a solvent.
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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.