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Lecture 6 > Dot Structures & VSEPR > Flashcards

Dot Structures & VSEPR Flashcards

1
Q

Hydrochloric Acid

A

HCI

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2
Q

HCl

A

Hydrochloric Acid

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3
Q

H2SO4

A

sulfuric acid

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4
Q

sulfuric acid

A

H2SO4

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5
Q

HNO3

A

nitric acid

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6
Q

nitric acid

A

HNO3

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7
Q

HC2H3O2

A

Acetic acid

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8
Q

Acetic Acid

A

HC2H3O2

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9
Q

Carbonic acid

A

H2CO3

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10
Q

H2CO3

A

carbonic acid

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11
Q

What is a lewis dot structure?

A

structural representation of a molecule where dots are used to show valence electron’s position around the atoms

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12
Q

What do the dot pairs/lines represent

A

covalent bonds

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13
Q

Rules to create a dot structure for a molecule

A
  1. Count valence electrons
    2.Assign a central atom, usually atom with most avaliable bonds
    3.Connect the 2 atomms
    4.Finish octet around central atom
    5.Even distribute electrons around the rest of the atoms
    6.Move paris to complete octet for each atom
  2. If there are more or less and 8 electrons, the exception will only be around the central atom
    (Hydrogen only needs 2 dots)
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14
Q

What are domains or regions?

A

electron groups around the central atom

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15
Q

Bonding or shared domains

A

between central atom and the atom that are attached (bonded)
-single, double, and triple all count as 1 bonding domain

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16
Q

Nonbonding/ unshared/ lone pair

A

electrons that are off of the central atom that arent being shared with another atom

17
Q

What element is never the central atom?

A

hydrogen

18
Q

What is a resonance structure?

A

when there is more than one way to fulfill the octet rule

19
Q

What is the Valence Shell Electron Pair Repulsion (VSEPR) theory

A

states that the geometric arrangement of atoms or groups of atoms around a central atom in a covalent compound r charged ion is determined solely by the repulsions between electron pairs present in the valence shell of the central atom

20
Q

what is the VSEPR theory used for?

A

predicting the shape of the molecule

21
Q

What is the purpose of a molecule’s shape?

A

to minimize the electron replusion between electrons

22
Q

VSEPR Rules

A

1.draw lewis structure for the molecule
2.count total number of domains
3. Use reference sheet to find the shape

Lecture 6 (6 decks)

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