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6. what shape does a complex with a coordination number of 6 usually form
- hexahedral
- octohedral
- ditrigonal planar
- tetrahedral
7. (Fe(H2O)6)^2+ and dropwise ammonia is a ...reaction
- deprotonation
- protonation
- reduction
- oxidation
8. What are the side effects of using cisplatin as a cancer treatment
- damage to hair cells,neutrophils and sometimes kidneys
- damage to hair cells and red blood cells
- damage to red blood cells only
- damage to neutrophils and skin cells
9. (Cu(H2O)6)^2+ and excess ammonia forms...
- (Cu(NH3)4(H2O)2)^2+
- no reaction
- (Cu(NH3)6)^2+
- (Cu(OH)2(H2O)4)
10. what happens when excess ammonia is added to (Fe(H2O)3(OH)3)
- no visible change
- fizzing
- precipitate dissolves
- colour change brown to green
11. what ion is used in haemoglobin
12. what can EDTA^4- be used for
- treatment for heavy metal poisoning
- treatment for cancer
- removal of poisons from catalysts
- nothing- it is completely useless waste of space
13. what property of transition metals allow them to be good catalysts
- variable oxidation states
- form complexes
- very reactive
- strong metals
14. what is teh colour change when (Co(NH3)6)^2+ is oxidised to (Co(NH3)6)^3+
- yellow to pink
- yellow to brown
- blue to pink
- blue to brown
15. what is the definitoin of a transition metal
- an element that changes between metal and non-metal
- a metal with no electrons in d-orbital
- a metal that has at least 1 ion with an incomplete d-orbital
- a metal within the middle section fo the periodic table
16. which of the following is not a property of transition metals
- highly stable, inert elements
- forms coloured complexes
- variable oxidation states
- good catalysts
17. why are complexes with multidentate ligands more stable than those with unidentate ligands
- chelate effect
- stability effect
- shielding effect
- ligand effect
18. what colour is formed when excess ammonia is added to aqueous Co^2+ ions
- green/blue
- straw colour
- dark blue
- pink
19. how many dative/coordinate onds can form between a molecule of EDTA^4- and a transition metal ion
20. why is a support medium used for heterogenous catalysts
- the catalysts are very expensive and the surface area is increased
- to stop the catalyst getting lost within the products
- the catalyst needs to react with the support medium before it functions properly
- the support medium reacts with any impurities to remove them from the system