LABORATORY REVIEW
DIFFUSION AND OSMOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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water flows to the side with the lower food coloring concentration
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food coloring flows to the side with the lower food coloring concentration
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water and food coloring flow back and forth to make the concentrations the same
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water diffuses to the area with the lower water concentration
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Detailed explanation-1: -The hypertonic solution has a lower water concentration than the hypotonic solution, so a concentration gradient of water now exists across the membrane. Water molecules will move from the side of higher water concentration to the side of lower concentration until both solutions are isotonic.
Detailed explanation-2: -Water moves through a semipermeable membrane in osmosis because there is a concentration gradient across the membrane of solute and solvent. The solute cannot effectively move to balance the concentration on both sides of the membrane, so water moves to achieve this balance.
Detailed explanation-3: -During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will continue to move across the membrane in both directions.
Detailed explanation-4: -On both sides of the membrane the water level is the same, but there are different concentrations of a dissolved substance, or solute, that cannot cross the membrane (otherwise the concentrations on each side would be balanced by the solute crossing the membrane).
Detailed explanation-5: -This is because the solutes interact with water molecules and block water from crossing the membrane. As a result, water is more likely to pass across the membrane towards the side with a higher solute concentration.