17B.2 Flashcards
what is the colour of [Co(H2O)6]^2
pale pink solution
what is the colour of [Co(H2O)4(OH)2]
Blue precipitate
what is the colour of [Co(NH3)6]^2+
pale yellow
what is the reaction, reaction type, colour change when aq sodium hydroxide is added to [Co(H2O)6]^2+
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what is the reaction, reaction type, colour change when aq ammonia is added in excess is added to [Co(H2O)6]^2+
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what happens when we leave [Co(NH3)6]^2+ out in the air
the Cobalt will be oxidized by oxygen in the air from 2+ to 3+ making the pale yellow solution turn darker yellow as [Co(NH3)6]^3+ ions forms
why does the complex [Co(NH3)6]^3+ colour look brown
this is because other products form from ligand exchange reaction with both water and any negative ions present
what is the colour of [CoCl4]^-2 complex
blue
what is the reaction, reaction type, colour change when CONCENTRATED HCl is added to [Co(H2O)6]^2+
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what is the reaction, reaction type, colour change when aq sodium hydroxide is added to [Fe(H2O)6]^2+
page 202
what is the reaction, reaction type, colour change when aq ammonia is added to [Fe(H2O)6]^2+
page 202
what happens when [Fe(H2O)4(OH)2]is left in the air
it gets oxidized (Fe2+ to Fe3+) and the green precipitate colour changes into brown forming [Fe(H2O)3(OH)3]
[Fe(H2O)3(OH)3] is what colour
brown precipitate
[Fe(H2O)6}^3+ is what colour
yellow-brown
what is the reaction, reaction type, colour change when aq OH is added to [Fe(H2O)6]^3+
page 202
