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Biochemistry Laboratory > pH chuchu > Flashcards

pH chuchu Flashcards

1
Q

If pH < 7, then the solution is

A

acidic

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2
Q

If pH = 7, then the solution is

A

neutral

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3
Q

If pH > 7, then the solution is

A

basic

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4
Q

Human blood is consider ________ with a pH of _______

A

basic, 7.35-7.45

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5
Q

The letters pH stand for

A

potential of hydrogen

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6
Q

pOH stands for

A

potential of Hydroxide

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7
Q

expressed as the negative logarithm of the hydrogen-ion concentration.

A

pH

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8
Q

expressed as the negative logarithm of the hydroxide-ion concentration.

A

pOH

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9
Q

a compound that can donate a hydrogen ion

A

acid

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10
Q

a substance that accepts hydrogen ions.

A

base

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11
Q

defines acids as substances that produce H+ ions in aqueous solution while bases are substances that produce OH- ions in aqueous solution

A

SVANTE ARRHENIUS

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12
Q

Mentioned that acids are electron-pair acceptors and bases are electron-pair donor

A

GILBERT N. (G.N.) LEWIS

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13
Q

Introduced the pH scale that measures the strength of an aqueous acidic or basic solution.

A

SØREN PETER LAURITZ SØRENSEN (S.P.L.) SØRENSEN

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14
Q

What do buffers do

A
  • Buffers prevent changes in pH.
  • Buffers resist changes in the pH even when acids or bases are added.
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15
Q

a mixture of a weak acid or alkali and one of its salts

A

buffers

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16
Q

A principle of equilibrium shift due to changes in buffer conditions.

A

La Chatelier’s Principle

17
Q

In our blood, ____________ is the most important buffer

A

carbonic acid

18
Q

a simple test to check if a substance is acidic or basic using a paper.

A

Litmus Test

19
Q

Blue litmus paper turns red for ______ pH
Red litmus paper turns blue for ______ pH

A

acidic
basic

20
Q

paper impregnated with organic compounds that change their color at different pH values.

A

INDICATOR PAPER

21
Q

should be calibrated first before being operating the device.

A

PH METER

22
Q

an indicator that can be used to determine the pH value of a solution

A

pH paper

23
Q

an indicator that is used to determine the acidity or the basicity of a solution

A

litmus paper

24
Q

why should we calibrate ph meter

A

Small changes in electrode output occur over time, as well as from one electrode to another. For these reasons, the instrument should be calibrated periodically to ensure accurate and reliable measurements.

25
Q

The standard procedure for calibrating a pH meter is to
calibrate it at three different pHs, what are those measurements

A

(pH 7:neutral, pH 4:acidic, and pH 10:basic).

Biochemistry Laboratory (8 decks)

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