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Topic: Cobalt(II) salt  (Read 4981 times)

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Offline iyc

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Cobalt(II) salt
« on: February 17, 2005, 08:37:31 AM »
When water is added to anhydrous Cobalt(II) salt, it turns from blue to pink.
Is it a physical change or chemical change? Why?
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Demotivator

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Re:Cobalt(II) salt
« Reply #1 on: February 17, 2005, 11:10:36 AM »
A chemical change as cobalt forms a coordination complex with water molecules.
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Offline iyc

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Re:Cobalt(II) salt
« Reply #2 on: February 18, 2005, 05:31:26 AM »
Quote from: Demotivator on February 17, 2005, 11:10:36 AM
A chemical change as cobalt forms a coordination complex with water molecules.
What does "coordination complex with water molecules" mean?
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Demotivator

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Re:Cobalt(II) salt
« Reply #3 on: February 18, 2005, 01:12:10 PM »
meaning it bonds with water.
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