A solution of CoCI_(2).6H_(2)O in isopropyl alcohol and water is purple. The color change to blue when we add

A solution of CoCI_(2).6H_(2)O in isopropyl alcohol and water is purpl

1.	A solution of CoCI_(2).6H_(2)O in isopropyl alcohol and water is purple. The color change to blue when we add
Answer» <html><body><p>concentrated HCI<br/>`AgNO_(3)(aq.)<br/>both (1) and (2)<br/>none of these</p>Solution :The purple color is due to the <a href="https://interviewquestions.tuteehub.com/tag/mixture-1098735" style="font-weight:bold;" target="_blank" title="Click to know more about MIXTURE">MIXTURE</a> of `[Co(H_(2)O)_(6)]^(2+)` (pink) and `[CoCl_(4)]^(2-)` (blue): <br/> `[Co(OH_(2))_(6)]^(2+)+4Cl^(-)hArr[CoCl_(4)]^(2-)+6H_(2)O` <br/> When we add concentrated HCI, excess `Cl^(-)` shifts the equilibrium to the right (blue). <a href="https://interviewquestions.tuteehub.com/tag/adding-2399902" style="font-weight:bold;" target="_blank" title="Click to know more about ADDING">ADDING</a> `AgNO_(3)` (aq.) removes some `Cl^(-)` by <a href="https://interviewquestions.tuteehub.com/tag/precipitation-16670" style="font-weight:bold;" target="_blank" title="Click to know more about PRECIPITATION">PRECIPITATION</a> of `AgCl(s)` and favours the reaction to the left (<a href="https://interviewquestions.tuteehub.com/tag/produces-1167808" style="font-weight:bold;" target="_blank" title="Click to know more about PRODUCES">PRODUCES</a> more `[Co(OH_(2))_(6)]^(2+)` and the resulting solution is pink.</body></html>