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30019- Molecules to Materials: deconstructing the environment > pH > Flashcards

pH Flashcards

1
Q

What does pH measure?

A

acidity

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2
Q

What is the unit for pH?

A

-log10[H+]

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3
Q

What is pH and equilibrium between?

A

H+ and OH-

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4
Q

How many parts are there to the pH scale?

A

14

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5
Q

What is neutral on the pH scale?

A

around 7

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6
Q

What is the acidic range on the pH scale?

A

when you start dropping below 7

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7
Q

What is the alkaline range on the pH scale?

A

start going above 7

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8
Q

What has a pH of 0?

A

battery acid

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9
Q

What has a pH of 1?

A

stomach acid

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10
Q

What has a pH of 2?

A

lemon juice

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11
Q

What has a pH of 3?

A

orange juice

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12
Q

What has a pH of 4?

A

acid rain

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13
Q

What has a pH of 5?

A

black coffee

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14
Q

What has a pH of 6?

A

urine

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15
Q

What has a pH of 7?

A

‘pure’ water

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16
Q

What has a pH of 8?

A

sea water

17
Q

What has a pH of 9?

A

baking soda

18
Q

What has a pH of 10?

A

milk of magnesia

19
Q

What has a pH of 11?

A

ammonia

20
Q

What has a pH of 12?

A

soapy water

21
Q

What has a pH of 13?

A

bleach

22
Q

What has a pH of 14?

A

drain cleaner

23
Q

What will acids do with their protons?

A

will donate one or more

24
Q

What will alkaline do with their protons?

A

accept one or more protons

25
Q

What is a strong acid?

A

fully dissociate to release all potential acidity

26
Q

What is an example of a strong acid?

A

hydrochloric acid

27
Q

What do weak acids do?

A

partially dissociate

28
Q

What is an example of a weak acid?

A

acetic acid

29
Q

What do we use to calculate pH of weak acids?

A

acidity constant Ka

30
Q

What is pH often controlled by in the environment?

A

weak acids

31
Q

When does carbonic acid form?

A

dissociation of CO2 into ocean

32
Q

What is the acidity constant?

A

Ka

33
Q

What is the water constant?

A

Kw

34
Q

What makes rainwater acidic?

A

CO2 dissolves into water creating carbonic acid (weak)

35
Q

What is a weak acid?

A

One which partially disassociates or deproteinates

36
Q

What is stochiometry?

A

amount of substance involved in a reaction and how it should be balanced on both sides of the equation

37
Q
A

30019- Molecules to Materials: deconstructing the environment (29 decks)

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