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Bioscience > Asses Bases and pH > Flashcards

Asses Bases and pH Flashcards

1
Q

Are water molecules polar or nonpolar

A

Polar (it has a positively and negatively charged side)

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2
Q

Which region of water is positive? Which is negative

A

Positive = Hydrogen regions

Negative = Oxygen region

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3
Q

Where does the hydrogen bond form in water molecules?

A

Between the oxygen atom of one molecule with the H+ atom of another molecule

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4
Q

What happens when NaCl is added to water?

A

Na+ is attracted to O-

Cl- is attracted to H_

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5
Q

True or false: water is highly soluble and can act as a solvent for ionic or polar substancecs

A

True

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6
Q

True or false: water has a low heat cacpacity

A

False; water has a high heat capacity and can absorb a lot of energy with only a small increase in temp.

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7
Q

What is Molarity?

A

Measures concentration in moles per liter or grams per l

mol/l) or (g/l

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8
Q

What is dissociation?`

A

When compounds dissolved in water separate

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9
Q

Acids are a proton _________. (donor or acceptor)

A

Donor

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10
Q

Bases are a proton ________. (donor or acceptor)

A

Acceptor

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11
Q

What do acids dissociate into?

A

Hydrogen ions (H+) and anions

HCl &raquo_space; Cl- + H+

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12
Q

What do bases dissociate into?

A

Hydroxide ions (OH-) and cations

NaOH&raquo_space; OH- + Na+

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13
Q

A ________ reaction happens when an acid and base are mixed

A

Neutralization

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14
Q

True or false: salts dissociate into ions and therefore contain hydrogen ions

A

False; salts do not contain H+ ions but will still dissociate when dissolved

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15
Q

True or false: salts carry an electric current

A

True

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16
Q

What is the difference between a strong and weak acid?

A

Strong acid: completely dissociates in water

Weak acid: does not or only partially dissociates in water

17
Q

High pH = high _________ concentration

A

Hydroxide (OH-)

18
Q

Low pH = low __________ concentration

A

Hydrogen (H+)

19
Q

pH = 1M solution of ________.

(HCL or NaOH) ?

A

HCL

20
Q

pH 14 = 1M solution of __________.

(HCL or NaOH)?

A

NaOH

21
Q

pH of 5 is _____ times more acidic than pH of 6

A

10 times

22
Q

What adjusts pH of a solution and helps to maintain homeostatsis?

A

Buffers

23
Q

What pH is considered acidosis?

A

pH below 7.35

24
Q

What pH is considered alkalosis?

A

pH above 7.45

25
Q

In the carbonic acid-bicarbonate buffer system:
carbonic acid (H2CO3) acts as a _______ ________
and bicarbonate ion (HCO3-) acts as a ______ _______.

A

H2CO3 = weak acid

HCO3- = weak base

26
Q

What does pH measure?

A

H+ ion concentration

pH = power of Hydrogen

27
Q

Hyperventilation leads to respiratory __________

A

Alkalosis

Partial pressure of CO2 is inversely proportional to pH

28
Q

Hypoventilation leads to respiratory ___________.

A

Acidosis

Partial pressure of CO2 is inversely proportional to pH

Bioscience (7 decks)

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