diffusion lab

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20 Terms

1

diffusion

random movement of molecules form high to low concentration

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2

for diffusion to occur there must be

concentration gradient

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3

passive process

no energy required

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4

is diffusion passive or active

passive

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5

barrier to diffusion

cell membrane

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6

selectively permeable

allows passage of some but not others

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7

factors that influence rate of diffusion

steepness of diffusion

molecular weight

temperature

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8

molecules of slat and water are produced when

acids and bases react

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9

dialysis

solutes diffuse across semipermiable membrane

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10

osmosis

diffusion of water across selectively permeable membrane

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11

iodine solution tests for

starch

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12

benedicts solution tests for

reducing sugars

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13

Benedict solution turns (if pos)

blue to yellow

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14

iodine turns (if pos)

purple

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15

silver nitrate turns (if pos)

white and cloudy

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16

silver nitrate tests for

chlorine

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17

relationship between temp and diffusion

directly proportion (increased heat = increased diffusion)

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18

did glucose diffuse out of dialysis bag

yes

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19

did iodide diffusion into bag

yes

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20

did glucose diffuse out of dialysis bag

yes

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