1.3.5 Shapes of Molecules Flashcards

1
Q

Predict the shape of the NH₄⁻ ion & explain why.

A
  • tetrahedral
  • equal repulsion
  • between four bonding pairs
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2
Q

2 bonding pairs, 0 lone pairs

A

linear, 180

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3
Q

2 bonding pairs, 1 lone pair

A

bent, 118°

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4
Q

2 bonding pairs, 2 lone pairs

A

bent, 104.5° (e.g water)

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5
Q

3 bonding pairs, 0 lone pairs

A

trigonal planar, 120°

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6
Q

3 bonding pairs, 1 lone pair

A

trigonal pyramidal, 107°

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7
Q

3 bonding pairs, 2 lone pair

A

T-shaped, 90°

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8
Q

3 bonding pairs, 3 lone pairs

A

T-shaped 90

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9
Q

4 bonding pairs, 0 lone pairs

A

tetrahedral, 109.5°

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10
Q

4 bonding pairs, 1 lone pair

A

seesaw, <90° & <120°

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11
Q

4 bonding pairs, 2 lone pairs

A

square planar, 90° & 180°

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12
Q

5 bonding pairs, 0 lone pairs

A

trigonal bipyramidal, 90° & 120°

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13
Q

5 bonding pairs, 1 lone pairs

A

square pyramidal, 90° & 180°

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14
Q

2 bonding pairs, 3 lone pairs

A

linear, 180°

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15
Q

6 bonding pairs, 0 lone pairs

A

octahedral, 90° & 180°

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16
Q

Explain how to describe the shape of a molecule.

A

→ no. of bonding pairs & lone pairs
→ electron pairs repel & are as far apart as possible
→ if no lone pairs then electron pairs repel equally
→ with lone pairs, then lone pairs repel more than bonding pairs
→ shape & bond angle