Table of Contents
- 1 In what solution did the potato cells have a mass change of 0 1?
- 2 Why did the potato in 0.0 mol sugar solution increase in mass?
- 3 In what solutions did the mass of the potato cells increase more than 1?
- 4 What would your results be if the potato were placed in a dry area?
- 5 Why did some of the potato cores gain mass and why did some lose mass?
- 6 What happens to a potato in hypertonic solution?
- 7 How does osmosis affect the mass of a potato?
- 8 How do you calculate percentage change in mass of a potato?
In what solution did the potato cells have a mass change of 0 1?
Each column in the dataset is a variable and the cells in that column are the values of that variable. The variables recorded for each potato piece are Lab Group Name, Sucrose Concentration (Molarity), Initial Mass (g), Final Mass (g), and Mass Change (\%).
What happens when you put a potato in 1.0 M sugar solution?
The potato cylinders placed in strong sucrose solutions will lose mass/length as water will have moved from an area of high concentration (inside the potato cells) to an area of lower concentration (outside the potato cells).
Why did the potato in 0.0 mol sugar solution increase in mass?
The water passes through the potato cell membrane (a partially permeable membrane) into the potato, making it swell and increase in mass. If there is more sugar in the surrounding solution than the potato sample, the reverse happens.
Are potato cells hypertonic or hypotonic?
The potato sap has little solutes, and therefore it is hypotonic while the salt solution has more solutes. Therefore, it is hypertonic.
In what solutions did the mass of the potato cells increase more than 1?
the mass of the potato cores increases in distilled water and 0.2 M sucrose because the potatoes have a lower water potential than these solutions, causing water to rush into the potatoes.
In what solutions did the mass of the potato cells increase more than 1 \%?
The distilled water solution was hypotonic to the potato cells, therefore, water was moving into the inside of the potato cells causing them to gain the most mass. The 15 \% salt solution was the most hypertonic solution so the most water moved out of the potato cells causing them to lose the most mass.
What would your results be if the potato were placed in a dry area?
What would your results be if the potato were placed in a dry area for several days before your experiment? Cells would be dry, therefore higher gradient, water would flow into cells & Delta mass would be large for all solutions.
What happens to a potato in sucrose solution?
If the concentration of the sucrose solution is high, which is a hypertonic concentration, the length of potato strips and apple strips will decrease because the water molecules moved out from the potato and apple tissue to the sucrose solution. This causes a decrease in the length of potato and apple strips.
Why did some of the potato cores gain mass and why did some lose mass?
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. When the chips were put in distilled water they gain mass because the chips gain water from the surrounding solution due to osmosis.
What happen to the length of potato strips when immersed in high sugar concentration solution explain your answer?
What happens to a potato in hypertonic solution?
Osmosis can be seen very effectively when potato slices are added to a high concentration of salt solution (hypertonic). The water from inside the potato moves out of the potato cells to the salt solution, which causes the potato cells to lose turgor pressure.
How will you know if the potatoes are in a hypotonic solution?
This solution is referred to as hypotonic. The water will diffuse into the cells of the potato, causing them to swell; the cells may be characterized as being “turgid”, or swollen. The potato will assume a characteristic “flaccid” texture, because the cell membrane has separated from the protective cell wall.
How does osmosis affect the mass of a potato?
This happened because when there was less water, osmosis caused the solution to take the water from the potato which caused the potato to lose mass and when there was more water, the potato required more water to balance the amount of water on both sides. 2. At approximately what concentration are potato cytoplasm and the sucrose solution isotonic?
Why do some potato sections increase in mass and others decrease?
In terms of tonicity, explain why some potato sections increased in mass, why some decreased in mass, and why some changed very little in mass. The potato sections in the solutions with more solute and less solvent decreased in mass and the reverse happened in the solutions with more solvent and less solute.
How do you calculate percentage change in mass of a potato?
Calculate the percentage change in mass for each potato section by dividing the change in mass by the initial mass and then multiplying by 100. Keep the negative sign if there was one on the change in mass. Carry out the calculations as described in step 7 and 8 again for volume instead of mass.
How is potato cytoplasm shown to be semi-permeable?
The potato cytoplasm permitted the water to enter or leave from the potato however, the sucrose from the solution was not allowed to enter the potato. From this, the potato cytoplasm is shown to be semi-permeable. 5. Explain why salt can be used as a weed killer.