What is the osmotic concentration of a potato?
After 20 hr osmosis, water loss is the same as after 4 hr, but solids gain has significantly increased. It can be seen that soluble solids concentrations and water activities in the potato and in solution are now equal. potato is equivalent in a, effectiveness to 3.8% salt (8.8-5%).
What is the osmolarity of potato cells?
The osmolarity of the sap was measured in a Wescor Vapor Pressure Osmometer. The osmolarity of our potato was 0.420 M, which is very similar to the concentrations of salts present in our potato sample in the isotonic solution.
What is the approximate concentration of a potato cell?
From our graph we concluded that potatoes have approximately a concentration of 0.197 M; this concentration is much lower than expected.
What happens to a potato in osmosis?
The shrinking and expanding of the potato strips is due to osmosis. Potatoes are made of cells, and their cell walls act as semipermeable membranes. The 0 grams solution contains less salts and more water than the potato cells (which have more salts and less water).
What is the concentration of potato cytoplasm?
This is at 0.4 Molar down to 1.0 Molar. This shows that in fact the potato cells are losing more water particles through osmosis, as there is a higher water concentration in the cytoplasm than in the 0.4 Molar sucrose.
What is the concentration of cytoplasm in potato cells?
What is the molar concentration of the sweet potato cells?
Using this method, the molarity of the interior of a sweet potato cell was calculated to be 0.805M and the molarity of the inside of a white potato cell was calculated to be 0.253M.
What concentration of sucrose is isotonic to potato cells?
The 15 year old investigator went on to find that her potatoes were isotonic with an 11.5% sucrose solution.
What is the natural salt concentration inside of a potato cell?
The distilled water was hypotonic compared to the potato cells that contain approximately 2% salt. Hence why both the individual and class data indicated a gain in the potato mass.
How does sugar concentration affect osmosis in potatoes?
Hypothesis: when potato chips are placed in solutions with high concentrations of sugar (for example 0.8 mol L-1) then they will lose mass as the chip will lose water because of osmosis. The chips gain water because the distilled water has a higher water concentration than the chips.
How does osmotic activity affect the mass of a potato?
Depending on certain factors the osmotic activity between the potato tuber and glucose solution will either increase, decrease, or unaffect the mass of the potato, such as – whether the sugar to water ratio inside the potato and outside of the potato differ or not.
What conditions define the equilibrium state between potato and osmosis solution?
A study was conducted to determine what conditions define the equilibrium state between potato and osmosis solution for an osmosis concentration process. It was shown that at equilibrium, there is an equality of water activity and soluble solids concentration in the potato and in the osmosis solution.
Does temperature affect osmotic dehydration profile of sweet potato cubes?
A study was conducted to evaluate the effects of temperature and sucrose osmotic solution concentrations on osmotic dehydration profiles of sweet potato (Ipomea batata) cubes (3.5 cm sides). Two temperatures (26 and 50°C) and three concentrations (30:100, 50:100 and 70:100 w/w) were studied for various exposition times, up to 168 hours.
What is the concentration of salt in an osmotic solution?
Three salt concentration levels (5%, 12.5% and 20%), three temperature levels of osmotic solution (28 °C, 43 °C and 58 °C) and the observations on weight loss and solid gain were taken at an interval of 5 min up to first half an hour followed by interval of 10 min for next 1 h.