1 Calcium solution
2 Barium solution
3 Strontium solution
In which solution or solutions does not precipitate form when potassium ferro cyanide solution is added to the above solutions buffered with ammonia and ammonium chloride?

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  1. The best information I can find says that Ca is the only ion of the three that will ppt from NH3/NH4Cl buffered solution. The other two will not. I don't know from first hand experience.

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