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unit 5 chem > transition metals > Flashcards

transition metals Flashcards

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1
Q

define transition elements

A

d-block elements that form at least one stable ion with a partially filled d-subshell d1-d9 (Scandium and Zinc are not transition metals)

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2
Q

why do transition elements have variable oxidation states?

A

e- sit 4s/3d energy levels very close so gain/lose a similar amount of energy

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3
Q

why are transition elements good catalysts?

A
  • they can receive or lose some electrons in the d-orbitals to speed the reaction
  • Transition metals have surfaces which adsorbs substances to lower activation energy
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4
Q

what colour does Cu2+ go in aq solution/OH-/NH3 to aq sol./excess OH-/NH3 to precipitate?

A

aq=blue
OH/NH3 aq=pale blue precipitate
OH precipitate=insoluble
NH3 precipitate=dark blue solution

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5
Q

annogram to remember Cu2+

A

Bill,Put Bottle Plastic, In, De Bin

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6
Q

Fe2+ annogram

A

Pete Got, Done Grim Put, In, Isolation

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7
Q

what colour does Fe2+ go in aq solution/OH-/NH3 to aq sol./excess OH-/NH3 to precipitate?

A

aq=pale green
OH-/NH3 aq=dirty green precipitate
NH3/OH precipitate=insoluble

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8
Q

Fe3+ annogram

A

Yell, Over Please, Into, Ir

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9
Q

what colour does Fe3+ go in aq solution/OH-/NH3 to aq sol./excess OH-/NH3 to precipitate?

A

aq=yellow
OH/NH3 aq=orange precipitate
OH/NH3 precipitate=insoluble

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10
Q

Mn2+ annogram

A

Put Pressure, Put Pressure, Innit, Innit

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11
Q

what colour does Mn2+ go in aq solution/OH-/NH3 to aq sol./excess OH-/NH3 to precipitate?

A

aq=pale pink
OH/NH3 aq=pink precipitate
OH/NH3 precipitate=insoluble

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12
Q

Cr3+ annogram

A

Give, Greens (a) Go Please, Dinner (is) Good So, Please Sit

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13
Q

what colour does Cr3+ go in aq solution/OH-/NH3 to aq sol./excess OH-/NH3 to precipitate?

A

aq=green
OH/NH3 aq=green-grey precipitate
OH- precipitate= dark green solution
NH3 precipitate=purple solution

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14
Q

how to remember this bloody list of aq solution/OH- etc.

A

Ah So, OH No, extra OH, extra No

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15
Q

what classes as smaller/larger ligands?

A

small=6 ligands around central metal ion

large=4 ligands around central metal ion

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16
Q

How to calculate total oxidation state of metal

A

total oxidation state(charge outside of bracket)-total oxidation state of ligands(times charge of ligands around central metal ion by how many there are or add up if they’re all not the same)

17
Q

what ions can easily get displaced in cis-platins?

A

Cl- ions

18
Q

give 2 structural properties of haemoglobins

A

multidentate and octahedral

19
Q

define a ligand

A

a molecule with a lone pair of electrons capable of forming coordinate bonds to a metal ion

20
Q

define a complex ion

A

a central metal ion surrounded by ligands

21
Q

% purity calculation

A

mass of pure chemical/total mass of sample x 100

unit 5 chem (1 decks)

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