Lab Quiz Osmosis Diffusion Flashcards
Bag 2
What does it contain
Describe changes
Direction of water movement
Gained water bc bag is hyper tonic solution in compassion to water (solution)
Solution: water
Bag: sucrose 15%
Bag 1
What did it contain
Describe changes
Direction of water movement
Contains-distilled water in bag and solution
Stayed around same general weight(9.47-9.29)
Some water came in some went out
Bag 3
What does it contain
What direction did the water go
Describe changes in bag
Bag gained most weight
30% sucrose in bag
Water is solution
Gained most weight because it was the most hypertonic of the bags
Bag 4
What did it contain
Describe changes that occurred
Movement of water in each bag
Lost water (only bag to lose water out of 4)
Water went out of bag
Bag:water
Solution:30% sucrose
Extra cellular fluid is made of what
Albumin and salt
Albumin =egg white
What is in the bag that is placed in the extra cellular fluid
Starch and Na2So4
What is present in the beginning of the contents of the bag with starch/Na2S04
Starch
Sulfate ion
What is present in the extra celluar fluid in the beginning
Chloride ion and protein
Which substance moved down thier concentration gradient aka were able to go across membrane based in lab results
Chloride ion and sulfate ion
Which substance in the dyalisis bag were impermeable
Starch and protein
Starch test
- Add iodine
- If starch present test tube turns dark blue
Sulfate ion test
- Add drops of 2% BaCl2
- if sulfate ions present white precipitate (barium sulfate) forms
Chloride ion test
- Add drops of silver nitrate
- if chloride ions are present milky white precipitate (silver chloride) will form
Protein test
- Add drops of Biuret
- Turn light lavender if protein is present
What physical property of the substances that didn’t diffuse might explain why dyalisis bag was impermeable to these substance
Size of molecule
