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Biology > Unit 2 Properties to water > Flashcards

Unit 2 Properties to water Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Define cohesion

A

the tendency of molecules of the same kind to stick together due to hydrogen bonds

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2
Q

Define Adhesion

A

the clinging of one substance to another

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3
Q

Define Surface tension

A

the measure of how difficult it is to stretch or break surface of a liquid

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4
Q

Define Thermal energy

A

Energy associated with random atom movement

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5
Q

Define Heat

A

thermal energy transferring from a warmer body of matter to a cooler body of matter

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6
Q

Define Temperature

A

measure of intensity if heat

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7
Q

Define Evaporation

A

Change of a substance from liquid to gas state

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8
Q

Define Solution

A

liquid consisting of a uniform mixture of 2 or more substances

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9
Q

Define Solvent

A

the dissolving agent

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10
Q

Define Solute

A

the substance that is being disolved

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11
Q

Define an Aqueous solution

A

solution in which water is the solvent

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12
Q

what kind of compound can water dissolve

A

Ionic compound

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13
Q

what is the pH scale used for

A

to describe how acidic or basic a solution is

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14
Q

what does pH stand for

A

potential hydrogen

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15
Q

Define an acid

A

a substance that donates H+ to solution
(has a higher concentration of H+ than OH-)

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16
Q

Define a base

A

Substance that reduces the amount of H+ there is in a solution

17
Q

What is the range of the pH scale

A

0-14
0 being most acidic and 14 being basic

18
Q

the closer the pH number is to 0 the more H+ it has

A

pH 2 has 10x more H+ ions than pH 3

19
Q

what is the pH of most cells

A

pH of 7

20
Q

what is the pH of our blood

A

pH 7.4

21
Q

what is the blood pH that can cause a human to die within minutes

A

low as pH 7.0 to high as 7.8

22
Q

Define a buffer

A

substance than minimizes changes in pH

Biology (11 decks)

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