Which variables affect the rate of diffusion? Check all that apply.Check All That ApplySolubility of moleculesSolubility of moleculesSize of moleculesSize of moleculesConcentration gradientConcentration gradientPolarity of molecules
Question
Which variables affect the rate of diffusion? Check all that apply.Check All That ApplySolubility of moleculesSolubility of moleculesSize of moleculesSize of moleculesConcentration gradientConcentration gradientPolarity of molecules
Solution
The rate of diffusion is affected by several variables. These include:
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Solubility of molecules: The more soluble a substance is, the faster it will diffuse. This is because soluble substances can easily mix with the solvent, increasing the rate of diffusion.
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Size of molecules: Smaller molecules diffuse faster than larger ones. This is because smaller molecules move more quickly and easily, allowing them to spread out more rapidly.
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Concentration gradient: The greater the concentration gradient (the difference in concentration between two areas), the faster the rate of diffusion. This is because molecules always move from an area of higher concentration to an area of lower concentration.
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Polarity of molecules: Polar molecules, which have a charge, can be attracted or repelled by other molecules, affecting their rate of diffusion. Non-polar molecules, which do not have a charge, may diffuse at a different rate.
So, all the variables listed - solubility of molecules, size of molecules, concentration gradient, and polarity of molecules - can affect the rate of diffusion.
Similar Questions
1. Describe two variables that affect the rate of diffusion. __________________________________________________________________________________________________ __________________________________________________________________________________________________ 2. Why do you think the urea was not able to diffuse through the 20 MWCO membrane? How well did the results compare with your prediction? __________________________________________________________________________________________________ 3. Describe the results of the attempts to diffuse glucose and albumin through the 200 MWCO membrane. How well did the results compare with your prediction? __________________________________________________________________________________________________ __________________________________________________________________________________________________ 4. Put the following in order from smallest to largest molecular weight: glucose, sodium chloride, albumin, and urea. __________________________________________________________________________________________________ __________________________________________________________________________________________________ Simulated Facilitated Diffusion 1. Explain one way in which facilitated diffusion is the same as simple diffusion and one way in which it differs. __________________________________________________________________________________________________ __________________________________________________________________________________________________ 2. The larger value obtained when more glucose carriers were present corresponds to an increase in the rate of glucose transport. Explain why the rate increased. How well did the results compare with your prediction? __________________________________________________________________________________________________ __________________________________________________________________________________________________ 3. Explain your prediction for the effect Na+Cl- might have on glucose transport. In other words, explain why you picked the choice that you did. How well did the results compare with your prediction? __________________________________________________________________________________________________ Simulating Osmotic Pressure 1. Explain the effect that increasing the Na+Cl- concentration had on osmotic pressure and why it has this effect. How well did the results compare with your prediction? __________________________________________________________________________________________________ __________________________________________________________________________________________________ 2. Describe one way in which osmosis is similar to simple diffusion and one way in which it is different. __________________________________________________________________________________________________ __________________________________________________________________________________________________ 3. Solutes are sometimes measured in milliosmoles. Explain the statement, "Water chases milliosmoles"
As the concentration gradient of a solute molecule increases, _____.Group of answer choicesthe rate of diffusion increaseschange in rate of diffusion is unaffectedthe rate of diffusion decreaseschange in rate of diffusion is unpredictableNext
Fick's law of diffusion states that the rate of diffusion is directly proportional to theMultiple choice question.size of the molecules.distance across which diffusion occurs.pressure difference.
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