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CH 112 > exam three > Flashcards

exam three Flashcards

1
Q

what is an acid?

A

proton/H+ donor

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2
Q

what is a base?

A

proton/H+ accepter

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3
Q

what defines a strong acid?

A

completely ionizes in water

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4
Q

what defines a weak acid?

A

partially ionizes in water

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5
Q

five weak acids:

A

CH3COOH
HCOOH
HF
HClO
HNO2

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6
Q

how is a conjugate base created?

A

negative charge due to acid donating H+

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7
Q

how is a conjugate acid created?

A

positive charge due to accepting the H+

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8
Q

four strong acids:

A

HCl
HClO4
HNO3
H2SO4

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9
Q

how can you tell something is a weak base?

A

metal hydroxide (OH group)

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10
Q

how can you tell something is a strong base?

A

amine group

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11
Q

what is the strongest acid that can exist in an aqueous solution?

A

H3O+

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12
Q

how is Kw calculated?

A

Kw=[H3O+][OH-]=1x10^-14

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13
Q

how is pH calculated?

A

pH=-log[H3O+]

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14
Q

how is pOH calculated?

A

pOH=-log[OH-]

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15
Q

what is the sum of pH and pOH?

A

14

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16
Q

how can you calculate [H3O+] by only knowing pH?

A

10^-pH

17
Q

if pH value is greater than the pOH value, what is true about the solution?

A

basic

18
Q

if pH value is less than pOH, what is true about the solution?

A

acidic

19
Q

what does a low ionization constant mean?

A

negligible/won’t change or ionize a significant amount

20
Q

hydrolysis of salts reaction:

A

acid + base –> salt + water

21
Q

what does amphoteric mean?

A

can act as an acid or a base

22
Q

what is a buffer?

A

solution that will resist changes in pH

23
Q

what is common ion effect?

A

shift in equilibrium caused by addition of a compound having an ion in common with the dissolved substance

24
Q

Henderson hasselbach equation:

A

pH=pKa +log ([base]/[acid])

25
Q

what is the equivalence point in titrations?

A

point at which the reaction is complete

26
Q

what is an indicator?

A

substance that changes color at or near the equivalence point

27
Q

if you are titrating a strong acid and a strong base, what is the equivalence point?

A

~7

28
Q

what is Ksp?

A

solubility product constant

29
Q

what is solubility?

A

amount of solute that dissolves (g/L)

30
Q

what is molar solubility?

A

moles of solute dissolved in 1L of a saturated solution (moles/L)

31
Q

what does a high Ka value indicate?

A

strong acid

32
Q

if a Ka value is given to us, what can be assumed about the solution?

A

it is a weak acid

33
Q

what can be said about the conjugate base of a weak acid?

A

weak base

34
Q

what i

A
35
Q
A

CH 112 (5 decks)

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