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BIO 111 > Water > Flashcards

Water Flashcards

1
Q

mass per unit volume

A

density

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2
Q

most water on earth is _____

A

salt water

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3
Q

The human body is __% water

A

about 70

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4
Q

Water ____ upon freezing

A

expands

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5
Q

Is water polar or nonpolar?

A

polar

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6
Q

water molecules stick together through _______

A

hydrogen bonds

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7
Q

water is a versatile _______

A

solvent

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8
Q

the liquid in which a substance dissolved to form a solution

A

solvent

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9
Q

a liquid that is a completely homogenous mixture of 2 or more substances

A

solution

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10
Q

of a uniform quality throughout

A

homogenous

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11
Q

any polar molecule can interact with other polar molecules through hydrogen or _________ __________

A

electrostatic interactions

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12
Q

polar molecules are hydro____; nonpolar molecules are hydro_____

A

philic; phobic

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13
Q

water-loving

A

hydrophilic

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14
Q

water-hating

A

hydrophobic

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15
Q

a quantitative measure of the acidity or basicity of aqueous solutions

A

pH

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16
Q

pure water has an equal number of ________ ____ & _______ ____

A

hydrogen ions; hydroxide ions

17
Q

pure water is said to be ______

A

neutral

18
Q

a solution that contains more hydrogen ions than pure water is _____

A

acidic

19
Q

a solution that contains fewer hydrogen ions than pure water is _____

A

basic

20
Q

pH of 7.0 is _______

A

neutral

21
Q

pH less than 7.0 is ______

A

acidic

22
Q

pH more than 7.0 is ______

A

basic

23
Q

because hydrogen & hydroxide ions are very _______, changes in their concentrations drastically affect molecules of a cell

A

reactive

24
Q

the lower the concentration of hydrogen ions, the ________ the pH

A

higher

25
Q

the higher the concentration of hydrogen ions, the _________ the pH

A

lower

BIO 111 (9 decks)

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