D2.3 - Water Potential

Question 1

why is water a universal solvent

Answer 1

excellent solvent because it is polar

Question 2

how does water dissolve ionic compounds

Answer 2

water forms shells around ions to prevent rejoining

Question 3

how does water dissolve molecules & compounds

Answer 3

water forms hydrogen bonds with solutes to dissolve them

Question 4

osmosis

Answer 4

passive movement of water across a semi-permeable memberane towards areas of higher solute concentration

Question 5

iostonic solution

Answer 5

some concentration of solute in and out of cells

Question 6

hypotonic solution

Answer 6

lower concentration of solute outisde cell –> swelling

Question 7

hypertonic solution

Answer 7

higher concentration of solute outside cell –> shrinking

Question 8

how do cells control rates of osmosis

Answer 8

making membranes more or less permeable or changing solute concentration

Question 9

why do cells swell in hypotonic solutions

Answer 9

cells gain water, gain mass, water enters cell

Question 10

why do cells shrink in hypertonic solutions

Answer 10

cells loose water, lose mass, water out of cell

Question 11

effect of water movement on plant cells

Answer 11

have cell wall; prevents entry of excess water if placed in hypotonic solution

Question 12

effect of water movement on animal cells

Answer 12

no cell wall;

burst when water enters (hypo)

shrink when water leaves (hyper)

Question 13

effect of water movement on paramecium

Answer 13

adaptations such as contractile vacuole prevent bursting

Question 14

animals cell in hypotonic solution

Answer 14

lysed

Question 15

animals cell in hypertonic solution

Answer 15

shrivviled

Question 16

animals cell in isotonic solution

Answer 16

normal

Question 17

plant cell in hypotonic solution

Answer 17

turgid

Question 18

plant cell in hypertonic solution

Answer 18

plasmolysed

Question 19

plant cell in isotonic solution

Answer 19

flaccid