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Will Starch and Glucose move across a cell membrane?

Starch does not pass through the synthetic selectively permeable membrane because starch molecules are too large to fit through the pores of the dialysis tubing. In contrast, glucose, iodine, and water molecules are small enough to pass through the membrane. Diffusion results from the random motion of molecules.

What happened to the solution inside the bag after an hour to the starch solution?

The color change of the starch solution inside of the bag — a change to a deep purple, almost black color — shows that iodine was able to permeate the membrane and react with the starch in the solution. While the starch solution was originally milky white, it turned a dark purple/black color.

What will happen if cells are placed in a strong sugar solution?

If a living cell was placed in a sugar solution, it would cause outward osmosis to occur. The cell would then shrink as it lost water to the outside environment. This would occur because the sugar solution outside the cell would be hypertonic (have more solutes) relative to the inside of the cell.

How does sugar solution affect osmosis?

As the concentration of sugar solution increases, change in mass of the potato decreases. That is the rate of osmosis decreases with the decrease in concentration of water molecules. Sugar molecules in the sucrose solution are too large to go through a semi-permeable membrane so water moves out during osmosis.

Why do raisins shrink in concentrated sugar solution?

Explanation: when the concentration of water in the outside medium is low, the water present in cell comes out to increase the concentration of water outside medium through a semi permeable membrane. therefore the raisins shrink in concentrated sugar solution.

Is a sugar solution acidic or basic?

Sugar and artificial sweeteners are highly acidic foods, which is one of the reasons the consumption of sweets has recently been linked to so many health ailments. Here is a range of foods from the highly acidic (pH2) to the highly alkaline (ph10).

Is Honey acidic or basic?

Pure water has a neutral pH, however, the pH of water will change if any other substance or solution is added to it. Scientists have recorded a pH level of between 3.3 to 6.5 for different types of honey, so honey is therefore acidic.

Is a salt solution acidic or basic?

Ions can exhibit acidic or basic properties. For example, NH 4+ is acidic, and F – is basic. Salts, being strong electrolytes, dissociate completely in aqueous solution to produce the ions which they are composed of. Therefore, salt solutions can be acidic, basic or neutral.