x Flashcards

1
Q

what is the electron configuration of scandium

A

1s²2s²2p⁶3s²3p⁶3d¹4s²

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2
Q

what is the electron configuration of titanium

A

1s²2s²2p⁶3s²3p⁶3d²4s²

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3
Q

what is the electron configuration of vanadium

A

1s²2s²2p⁶3s²3p⁶3d³4s²

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4
Q

what is the electron configuration of chromium

A

1s²2s²2p⁶3s²3p⁶3d⁵4s¹

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5
Q

what is the electron configuration of manganese

A

1s²2s²2p⁶3s²3p⁶3d⁵4s²

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6
Q

what is the electron configuration of iron

A

1s²2s²2p⁶3s²3p⁶3d⁶4s²

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7
Q

what is the electron configuration of cobalt

A

1s²2s²2p⁶3s²3p⁶3d⁷4s²

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8
Q

what is the electron configuration of nickel

A

1s²2s²2p⁶3s²3p⁶3d⁸4s²

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9
Q

what is the electron configuration of copper

A

1s²2s²2p⁶3s²3p⁶3d¹⁰4s¹

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10
Q

what is the electron configuration of zinc

A

1s²2s²2p⁶3s²3p⁶3d¹⁰4s²

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11
Q

bidentate ligand

A

Donates 2 lone pairs forms two co-ordinate bonds

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12
Q

sterioisomerism

A

same structural formula but a different arrangement of the atoms in space

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13
Q

what are the 2 types of stereoisomerism that complex ions can show?

A
  • cis- trans isomerism

- optical isomerism

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14
Q

precipitation reaction

A

occurs when 2 aqueous solutions containing ions react together to form an insoluble solid, called a precipitate

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15
Q

monodentate ligand

A

donates 1 lone pair forming a co-ordinate bond

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16
Q

bidentate ligand

A

Donates 2 lone pairs forming two co-ordinate bonds

17
Q

[Cu(H₂O)₆]²⁺to [Cu(NH₃)₄(H₂O)2]²⁺

A
  • pale blue solution change to dark blue solution
  • when excess of aqueous ammonia
  • intermediate is blue of Cu(OH)₂
18
Q

[Cu(H₂O)₆]²⁺ to [CuCl₄]²–

A
  • pale blue solution changes to a yellow solution
  • when excess conc. HCl is added
  • intermediate green solution forms
19
Q

[Cr(H₂O)₆]³⁺ to [Cr(NH₃)₆]³⁺

A
  • violet solution changes to a purple solution
  • excess aqueous ammonia
  • intermediate is green-grey of Cr(OH)₃
20
Q

what should you always do when carrying out qualitative analysis tests?

A
  • add reagent drop-wise

- so that all observations are observed

21
Q

which complex ions show cis- trans isomerism

A

4- coordinate and 6-coordinate complex ions containing 2 different monodentate ligands

22
Q

which complex ions show both cis- trans and optical isomerism

A

6- coordinate complex ions containing monodentate and bidentate ligands

23
Q

what is the bond angle between identical ligands in cis-isomer of square planar complexes

24
Q

what is the bond angle between identical ligands in trans- isomer of square planar complexes

25
how can cis- trans isomers exist in octahedral complexes
four of one type of ligand and 2 of another type of ligand
26
how can optical isomers exist in octahedral complexes
containing 2 or more bidentate ligands
27
what are optical isomers also known as?
enantiomer
28
what is a feature of optical isomers?
non- superimposable mirror images of each other
29
disproportionation of Cu²⁺ions
- Cu₂O and hot dilute H₂SO₄ - Cu is brown solid - CuSO₄ is blue solution
30
[Cu(H₂O)₆]²⁺ to Cu(OH)₂
- pale blue solution to pale blue precipitate | - add NaOH (aq)