The processes of diffusion and osmosis account for much of the passive movement of molecules at the cellular level in this laboratory, you will study some of the basic principles of molecular movement in solution and perform a series of activities to investigate these processes. Solution has a lower solute concentration compared to the water potential the hypertonic solution, however, has a higher solute concentration and lower water potential in an isotonic solution, there is no net movement and there is an equal concentration of solutes and water in our lab, we modeled. Experiments: osmosis and diffusion experiment -2 aim: to demonstrate the process of osmosis with the help of a potato osmoscope requirements: a petri-dish, water, 20% sugar solution, a potato, a knife and some paper pins procedure: 1 cut one side of the potato tuber to obtain a flat surface. Agar cell diffusion use cubes of agar to investigate how size impacts diffusion by infusing cubes of agar with a ph indicator, and then soaking the treated cubes in vinegar, you can model how diffusion occurs in cells. Trouble shooting and cleanup tip: while running the osmosis/diffusion lab today, my students made an interesting discovery the iodine solution reacted with the glucose test strips (carolina biological osmosis lab replacement kit) and turned a color indicating a positive glucose reaction.
Biology at transmountain diffusion and osmosis: diffusion and osmosis lab (pdf) video web link: how osmosis works the el paso county community college district does not discriminate on the basis of race, color, national origin, religion, gender, age, disability, veteran status, sexual orientation, or gender identity. In order to give them a view of how diffusion works with a semipermeable membrane, i like to do a lab that uses a plastic bag to model the cell (membrane) it is a simple lab where students do very little except watch the process and record data and information. Ap bio lab 3: diffusion and osmosis abstract: the lab was performed in order to examine diffusion and osmosis through a membrane as well as investigate the effect of solute concentration on water potential in part one, dialysis tubes filled with 1m nacl solution were placed in beakers of distilled water to measure the percent change in mass over twenty minutes.
Acid rain lab- katherine betrus derrico 2012 cibt alumni workshop ecology high school inquiry/scientific method middle school plants students will design and conduct an experiment to test the effect of acid rain on the germination of seeds. Another way of conducting the experiment is to use the same solution/distilled water for each of the beakers and fill each dialysis tube with the four different solutions osmosis & diffusion: the lab - data & results. Diffusion this fundamental physical process affects the behaviour of molecules in vapour and in solution it is a core concept in science – including the physics of random molecular movements, the chemistry that results from random collisions, and the movement of essential molecules in biological systems, including the movement across membranes.
Diffusion is a physical phenomenon that occurs everywhere, and we barely notice it or understand how it works however, a few simple experiments can reveal the mysterious nature of this simple phenomenon. Lab diffusion, osmosis, and membrane transport date: name: general biology 2 instructor: jose bava, phd introduction diffusion and osmosis as related to cellular processes cells constitute the units of life and in order to stay alive they need to fulfill their metabolic activities. Learn diffusion osmosis 3 biology lab with free interactive flashcards choose from 500 different sets of diffusion osmosis 3 biology lab flashcards on quizlet. Diffusion lab report 1 luke wangoctober 27, 2009mr fergusonbiology 9 3b diffusion lab reportquestion how will the temperature of the water affect the rate of diffusionhypothesis if the water temperature is higher, then the rate of diffusion will increase, and vice versavariables independent variable water temperature dependent variable rate of diffusion controlled variables amount of water.
Ap biology lab 1 - diffusion & osmosis paul andersen starts with a brief description of diffusion and osmosis he then describes the diffusion demonstration and how molecules move over time he then explains the concepts behind the osmosis lab and how potatoes are affected by increasing sucrose molarity. Ib biology ia: osmosis - free download as pdf file (pdf), text file (txt) or read online for free the effect of increasing sucrose concentration on the mass of potato chips biology was an hl subject for me. Port, diffusion and osmosis describe the movement of molecules along the concentration gradient in a pas- biology 107 general biology lab 3: diffusion and osmosis molecules in solution tend to move down the concentration gradient in this lab exercise, we will use a simple. The experiments included are as follows: 1 to find the percentage of water in a sample of soil 100g soil is oven-dried or air-dried and the loss of weight found 2 to find the percentage of organic matter in a sample of soil 50g dry soil is strongly heated by a bunsen burner to ignite the organic matter.
Diffusion: diffusion refers to the process by which molecules intermingle as a result of their kinetic energy of random motion consider two containers of gas a and b separated by a partition. Name: _____ ap biology – lab 04 page 1 of 11 lab 04 – diffusion and osmosis objectives: describe the physical mechanisms of diffusion and osmosis understand the relationship between surface area and rate of diffusion describe how molar concentration affects the process of diffusion. Lab 1 osmosis & diffusion osmosis lab introduction: cells have kinetic energy this causes the molecules of the cell to move around and bump into each other diffusion is one result of this molecular movement diffusion is the random movement of molecules from an area of higher concentration to areas of lower concentration osmosis.