PURPOSE To observe osmosis in a cell 1) Place eggs in vinegar to remove shell 2) Measure weight of egg 3) Measure size of egg 4) Place one egg in corn syrup, other egg in water. 5) Weigh and measure eggs again
HYPOTHESIS CORN SYRUP EGG Corn Syrup Egg Size will not change Weight will stay the same Egg will look soggy and sticky
HYPOTHESIS WATER EGG Water Egg Weight would be heavier. Size would be bigger Egg will look fragile and soggy
OBSERVATIONS Before AfterCorn Syrup W- 71.3 W- 48.8 S- 17 cm S- 13 cmH2o W- 62.2 W- 77.0 S- 14 cm S- 18.5 cm
OBSERVATIONS (CONTINUE) (after vinegar) Eggs at the bottom. Bubbles from eggs float to top. (after syrup 24 hours) Floating, more bubbles, and a bit of foam at the top (after water 24 hours) More bubbles and foam 24 hours later, turned soft and squishy. Corn syrup egg = shrivelled water egg = puffy
CONCLUSION OF WATER EGG Got larger Water moved into egg Egg had lower concentration, water had high concentration Egg moved for lower to higher.
CONCLUSION OF CORN SYRUP EGG Got smaller Water moved out Egg had higher concentration, syrup had lower. Water moved from higher (egg) to lower concentration
HYPOTHESIS Corn syrup egg after experiment: Hypothesis was wrong Got smaller by size and weight Thought egg would stay same Egg shrunk Water in egg came out into corn syrup to balance water in and out of egg Water egg after experiment Hypothesis was correct Egg got bigger and weight Water entered egg because low concentration