# Osmosis And Diffusion Lab Report

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Osmosis And Diffusion Lab Report
Arianna Montoya

Osmosis and Diffusion Lab Report
Background
Information: Diffusion involves the movement of solute particles across a selectively permeable membrane from higher to lower concentrations. A selectively permeable membrane allows only some thing to go through. Water and oxygen are examples of molecules that are able to go through the membrane by diffusion. The net movement of these particles happens down the concentration membrane. Both diffusion and osmosis are passive processes meaning no energy in ATP
Osmosis is the diffusion of water across the selectively permeable membrane. Water will move in the direction where there is a higher concentration of solute ( meaning, a lower concentration of water) . In osmosis different concentrations of solutes are compared. A solution that has equal concentrations of solute is isotonic. A solution with a higher concentration of solutes is hypertonic and one with less concentration of solutes is hypotonic. “The term osmolarity is used to describe the number of solute particles in a volume of Gluid. Osmoles are used to describe the concentration in terms of number of particles.” It is deGined as the number of osmoles of solute per liter of solution.

Introduction: Experiment A: o Research Question: How does the amount of solute in a solution affect
The lowest percent change in mass of one the potatoes were the control (0.0 M), and the one in the 0.1M solution. They presented a weight change of 14.7% and 10.1% respectively, in contrast to the 28.7% and 17.4% weight change in the potatoes in the 0.5 and 0.6M solutions. The hypothesis was supported by the data obtained because it stated that the potatoes’ tubers’ tissue would loose more weight the higher the solute factor in the outside solution. When the potato tubers’ where placed in high-­‐in-­‐solute solutions it dehydrated the the potatoes tissue making it loose weight. The water inside the potato was forced to leave the inside of the tissues cells because of the higher solute

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