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Unit 5 Chemistry flash cards: Transition metals
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- 1What are transition metals?Elements which form one or more stable ions with incomplete d orbitals.
- 24 properties of transition metalsHard with high melting points
Shows more than one oxidation number
Tend to form coloured compounds
Shows catalytic activity - 3What is phytomining?Where TM's are extracted using plants from areas where they cannot be obtained economically by other methods.
- 4What colour is \(Ti^{3+}\)?Violet
- 5What colour is \(Co^{2+}\)?Pink
- 6What colour is \(Fe^{3+}\)?Yellow-brown
- 7What colour is \(Fe^{2+}\)?Pale blue-green
- 8What colour is \(Ni^{2+}\)?Emerald green
- 9What colour is \(Cu^{2+}\)?Blue
- 10How are anionic complexes named differently to cationic complexes?Anionic complexes are named with their Latin name
- 11\(CN^-\) ligand is named as...cyano...
- 12What are the Latin names of: Cobalt Aluminium Chromium Vanadium Copper Iron Nickel Silver Gold Tin LeadCobalate
Aluminate
Chromate
Vanadate
Cuprate
Ferrate
Nickelate
Argenate
Aurate
Stannate
Plumbate - 13What does EDTA stand for, how many LPs does it have and what is its charge?ethylenediaminetetraacetic acid
6 LP's
\(4^-\) - 14What is the cancer drug cis platin and what shape is it?[Pt(\(NH_3)^2Cl_2\)]
Square planar - 15What shape is tetrachlorochromate (III)Tetrahedral
- 16What shape is tetracyanonickelate?Square planar
- 17What shape is tetrachlorocobalate?Tetrahedral
- 18What shape is tetrabromonickelate?Tetrahedral
- 19Uses of copperPiping
Electrical wiring - 20Uses of chromiumNichrome alloy
Protective covering
Road markings
Tanning animal hides - 21What is a specific property of \([Cr(H_2O)_3(OH^-)_3]\)?Amphoteric
- 22How do d orbitals split in octahedral compounds?3 lower
2 higher - 23How do d orbitals split in tetrahedral compounds?2 lower
3 higher - 24Explain how TM compounds are coloured?Absorption of a photon of light causes electrons to jump form orbitals with lower energy to orbitals with higher energy. So a specific frequency is absorbed and the rest is transmitted which is the wavelength of the light left that we see.
- 25How do d orbitals split?When ligands approach the metal cation they cause repulsion which increases the energy of all the d orbitals, some more than others depending on how close the orbitals are from the ligands.
- 26Why does replacing bidentate ligands with EDTA create a more stable complex?Because there are more product molecules than reactant molecules therefore the entropy increases and total entropy is more likely to be positive making the fwds reaction spontaneous.
- 27Which ion disproportionates in solution?\(Cu^+\)
- 28What colours are: \(Cr^{2+}\) \(Cr^{3+}\) \(CrO_4^-\) \(Cr_2O_7^{2-}\)Pale blue
Violet / green when impure
Bright yellow
Orange - 29What happens to \(Cr^{2+}\) in air?It is oxidised to \(Cr^{3+}\)
- 30How do you make chromium ethanoate?Run HCl into a flask w/ Zn and Na dichromate which produces hydrogen reducing the dichromate to \(Cr^{2+}\) turning the solution blue
Close the tap at this point
\(Cr^{2+}\) is forced up the tube into another tube of Na ethanoate which react to form chromium (II) ethanoate. - 31Cat for forming polyethene\(TiCl_3\)
- 32Cat in Harber processFe
- 33Cat for contact process\(V_2O_5\)
- 34Cat for making margarineNi
- 356 uses of TM'sCats mimicking living systems
Cancer treatments
Photochromic glasses
Construction
Jewellery
Paint pigments and coloured glass
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- A2 level (Unit 5) Chemistry Fichas sobre Unit 5 Chemistry flash cards: Transition metals, creado por J000D97 el 04/04/2015.
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