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Hard and soft acids and bases

Kemizten
in Inorganic Chemistry

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Hi

 

I have a question about the thiocyanate ion, SCN-. How does it bond to Ca2+ and how does it bond to Hg2+. My guess was that SCN- is a soft base. Hg2+ is a soft acid, so those two go well together. But Ca2+ is a hard acid, so it doesnt go well with SCN-.

 

Is this right?

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