[Co(H2O)6]2+ ammonium thiocyanate

[Soda]

Hello

Im trying to work out what happens in this reaction, Im getting confused.

[Co(H₂O)₆]₂+ + NH₄SCN -> blue solution with a precipitate.

Am I correct to guess that it is forming the blue complex [Co(SCN)₄]₂- + 4NH₄ + 6H₂O

where NH₄ is the precipitate?

Help!

[peter]

Hello

Im trying to work out what happens in this reaction, Im getting confused.

[Co(H₂O)₆]₂+ + NH₄SCN -> blue solution with a precipitate.

Am I correct to guess that it is forming the blue complex [Co(SCN)₄]₂- + 4NH₄ + 6H₂O

where NH₄ is the precipitate?

Help!

The blue comples is in fact [Co(SCN)₄]₂-
but precipitate cannot be NH₄! Here is the reaction:
[Co(H₂O)₆]²⁺ + 4 NH₄SCN = [Co(SCN)₄]^2- + 4 NH₄⁺ + 6 H₂O

[Soda]

Thanks for that,

Could it be possible that the precipitate that we saw was not really precipitate from the reaction but excess ammonium thiocyanate solid?

[peter]

Could it be possible that the precipitate that we saw was not really precipitate from the reaction but excess ammonium thiocyanate solid?

Might be it!