Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

CHEM191 > Lecture 9 > Flashcards

Lecture 9 Flashcards

1
Q

What is the lewis definition of an acid?

A

an electron-pair acceptor

has a vacent electron orbital

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the lewis definition of a base?

A

an electron pair donor

has a lone electron pair

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a coordinate/dative bond?

A

When the two electrons come from the central atom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What makes a reaction an acid/base reaction?

A

When both forward and reverse reactions involve the transfer of a proton

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the species in acid/base reactions that differ by a proton?

A

Conjugate acid-base pairs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a Bronstead definition of an acid?

A

A proton donor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a Bronstead definition of a base?

A

A proton acceptor

needs electron pair to accept proton

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What can act as both an acid and a base?

A

Water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What happens in water when it is neutral?

A

H3O+ conc = OH- conc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is used for measuring H3O+ because it is so small?

A

pH

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Can OH- conc and H3O+ conc vary independantly?

A

No because of the equillibrium expression for autoprotolysis of water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is complete dissociation?

A

When acids donate their protons essentially completely to water.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What does complete dissociation happen to?

A

Strong electrolyted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What do strong acids have in terms of K?

A

A large K value

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What can be calculated from the stoichiometry of the dissociation reaction of strong acids?

A

H3O+ conc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What happens when strong bases react in water?

A

Essentially complete formation of hydroxide ion OH-

17
Q

What is key about the K in strong base reactions?

A

K is very large, at equillibrium only products consist

18
Q

What can be calculated from the stoichiometry of strong base reactions?

A

OH- concentration

19
Q

What is resonance?

A

The spreading out of negative charge across more than one atom.

20
Q

What happens to acids whose conjugate bases undergo resonance?

A

Tend to be stronger than those whose conjugate bases cannot.

CHEM191 (15 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions