Question

2p
33.
a)
Students were given 4 potato sticks whose concentration in their cell sap was 45% sugar and
salt. They measured their mass using an electric balance and placed them in different liquids
as shown
Stick A: placed in distilled water.
Stick B: placed in 10% sodium chloride solution.
Stick C: placed in 30% sodium chloride solution.
Stick D: placed in 50% sodium chloride solution.
After 5hours they measured the mass again and calculated the change in mass
(i). Predict which of the liquids would cause the largest decrease in mass of a potato stick​

Answer 1

Answer:

1. 1.0 (mol dm–3 sodium chloride solution) ;

2.(to remove) excess / surface/AW, water/AW, on potato sticks ;

to measure the mass of the potato (stick) only ;

3.cells / potato sticks, have lost water (by osmosis) ;

from high water potential to low water potential/down water potential

gradient ;

(cells / tissue/ potato) were, plasmolysed/ flaccid ;

loss of turgor (pressure) ;

not enough pressure of water pushing on cell walls ;

4. protein denatured (when cooked) ;

cell membrane, damaged/destroyed (when cooked) ;

no osmosis will occur ;

I hope this may helps you! :)