Lab Report on Osmosis - Biology

1820 Words8 Pages
Bio Lab Report Introduction: Osmosis is the spontaneous net movement of solvent molecules through partially permeable membranes into a region of higher solute concentration, in the direction that tends to equalize the solute concentrations on the two sides. It may however also be used to describe a physical process in which any solvent moves, without the input of energy across a semipermeable membrane (permeable to the solvent, however not the solute) separating two solutions of different concentrations. Even though osmosis does not require energy, it does use kinetic energy (Physics), which is the energy it possesses due to its motion. The osmotic pressure is defined to be the pressure required to maintain equilibrium, with no net movement of solvent. Osmotic pressure is colligative properties (which are properties of solutions that depend upon the ratio of the number of solute particles to the number of solvent molecules in a solution (Chemistry). Osmosis is essential in biological systems. The aim for this lab report is to assess the effect of weight and length of 5 different concentrations of a salt solution on 6 different potato wedges over 24 hours. To do this we will research how the effect of different salt solution concentrations will have an affect on 6cm length potato wedges. Research Question: How will the different potato wedges submerged in various salt solutions affect on the weight and length of the potato wedges? What is the DV and how exactly will you measure it and how many trials will you do: %∆ Change weight and length of the potato chips after they have been placed in different salt concentrations after 24 hours What factors could affect the DV: What? | How? | Why? | Temperature | Keeping the temperature the same by placing the petri dishes in the refrigerator. | Because it is stated that the higher the temperature,

More about Lab Report on Osmosis - Biology

Open Document