Investigating changes to equilibrium

Frage	Antworten
What system is used to measure change in response to temperature?	[Co[H2O]6]2+ + 4Cl- <--> CoCl42- + 6H2O
Step 1.	Dissolve CoCl2 in water in a boiling tube. Add a small amount of HCl. Place the boiling tube in iced water. The solution is a pink colour as [Co(H2O)6]2+ is formed
Step 2.	Transfer boiling tube into boiling water bath. Solution turns blue as CoCl42- is formed
System to investigate change in pressure on equilibrium	2NO2 <-> N2O4 Brown to colourless.
Concentration step 1.	Add solution of yellow K2Cr2O4 to beaker
Adding acid	Add dilute H2SO4 dropwise until no further colour change Yellow CRO42- --> Orange dichromate
Adding base	Dropwise until no further colour change Orange Cr2O72- --> Yellow CrO42-

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