Name:_______________________ Date:___________ Period:______ Page:_______ Potato Diffusion Lab Hypothesis:________________________________________________________________________ __________________________________________________________________________________ Materials Aprons/Goggles Potato Slice (2-3cm thick) Potato Borer Triple beam balance 6 x 100mL beakers plastic wrap Paper towel 50mL Distilled Water 50mL 0.2M Sucrose solution 50mL 0.4M Sucrose solution 50mL 0.6M Sucrose
Premium Water Seawater Osmosis
molecular weight is‚ the faster the diffusion gets. The Starch did not pass through the membrane because it is composed of Polysaccharide made up of many Glucose molecules‚ which makes it heavier than one single Glucose molecule to pass through. Osmosis: We took three piece of potato and placed them in three beakers with the same quantity of water but with different concentrations‚ results are: Solution Result 0.9% NaClNothing happens H2O Hypotonic : Potato Swells 30% NaClHypertonic: Potato
Premium Glucose Osmosis Water
Initial mass (kg) Final mass (kg) Change in mass (%) 0.10 0.95 1.25 31.57 0.20 0.94 1.13 20.21 0.30 1.03 1.15 11.65 0.40 0.95 1.05 10.52 0.50 0.88 0.86 -2.27 0.60 0.93 0.84 -9.67 Control 0.99 1.40 42.41 Discussion. Osmosis is the passive diffusion of water molecules across a selectively permeable membrane from a down a concentration gradient. The water potential of a system is the tendency for water to exit the system. In this experiment the aim was to measure the
Premium Osmosis Concentration Solution
will be able to freely cross the membrane and do not affect tonicity because they will always be in equal concentrations on both sides of the membrane. Also‚ water will flow from a hypotonic solution to hypertonic. 4- Explain the direction of osmosis and effects of tonicity (hypotonic‚ hypertonic‚ or isotonic) in plant and animal cells. Use lab results in your explanation. If a cell is placed in an isotonic solution‚ the cell will maintain its normal volume because no osmotic pressure is occurred
Premium Osmosis Concentration Iodine
Activity 1: Stimulating Dialysis (Simple Diffusion) 1. Describe two variables that affect the rate of diffusion. The two variables that affect the rate of diffusion are: • The composition of the lipid layer‚ this content varies from tissue to tissue. For example kidney tissues have a high cholesterol content which makes them impermeable to water. • The size of the molecule‚ the larger the molecule the slower the rate of diffusion. 2. Why do you think the urea was not able to diffuse
Premium Diffusion Osmosis Molecular diffusion
a dynamic structure which gives them their remarkable activity and selectivity. (Hickman‚ 2008). Diffusion is the movement of particles from an area of higher concentration to a lower concentration until they reach Equilibrium. (Hickman‚ 2008).Osmosis happens when water diffuses across the membrane from the region of lower solute concentration (higher free water concentration) to that of higher solute concentration (lower free water concentration) until the solute concentrations on both sides of
Premium Osmosis Cell membrane Red blood cell
Activity 3 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.” ___ ___ 4. The conditions were 9 mM albumin in the left beaker
Premium Diffusion Osmosis Molecular diffusion
sucrose. The membrane is not permeable to the sugar molecules. Indicate which side is initially hypertonic and which is hypotonic. Show‚ using an arrow‚ the direction of osmosis. 4. Red blood cells are placed in three beakers containing the following solutions: Beaker distilled water‚ Beaker B – isotonic solution‚ Beaker
Premium Cell membrane Osmosis
The Effect Salt Water Has On Radish Plant Growth By: Collins Azubuike
Premium Osmosis Water Cell wall
1. Substances soluble in fat: fatty acid‚ glycerol‚ some vitamins (A‚D‚E‚K) 2. Neutral particles: water‚ oxygen‚ carbon dioxide‚ Example of Diffusion Between alveoli and blood capillaries in the lung during gases exchange. OSMOSIS What is Osmosis? Osmosis is the diffusion of a water through a semi-permeable membrane‚ from a solution of low solute concentration to a solution with high solute concentration. It is a physical process in which a solvent moves‚ without input of energy‚
Premium Diffusion Adenosine triphosphate Molecular diffusion