14054856
Description
Flashcards by I Shouldn't be awake, updated more than 1 year ago
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Created by I Shouldn't be awake
about 6 years ago
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| Question | Answer |
| 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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