Chemistry

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Enzyme

Semipermeable membrane

AP Bio Lab 2

Analyses Osmosis and Diffusion Osmosis and Diffusion are processes of passive transport. In this lab we studied the basic concepts of molecular movement in solutions. During the execution of the experiment, I became aware that molecules are in constant motion and tend to move from areas of higher concentration to those of lower concentration. Diffusion is the movement of molecules following that concentration gradient. It occurs on the diverse states of matter. Osmosis refers to the specialized diffusion of molecules of water through a selectively permeable membrane.

AP Biology: Lab 1 Example

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Starch

Sucrose

Glucose

health

lab

Contents Initial Mass Final Mass Mass Difference Percent of Change in Mass Average Change in Mass for Repeated Contents 0.0 M Distilled Water 7.04 8.15 +1.11 +15.76% 0.2M Sucrose 9.47 9.79 +0.32 +3.37% +2.08% 0.2M Sucrose 8.85 8.93 +0.07 +0.79% +2.08% 0.4M Sucrose 9.75 9.50 -0.25 -2.56% -2.41% 0.4M Sucrose 7.05 6.89 -0.16 -2.26% -2.41% 0.6M Sucrose 6.96 4.80 -2.16 -31.03% 0.8M Sucrose 13.50 9.50 -4.00 -29.62% 1.0M Sucrose 4.98 3.52 -1.46 -29.31% DATA Potato Core Data In Sucrose Solutions Assigned Questions Which substances are entering the bag and which are leaving the bag?

Diffusion Worksheets

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health

AP Biology James Pre-Lab: Diffusion and Osmosis in Model Systems In parts 1 and 2 of this lab, you will have the opportunity to investigate the processes of diffusion and osmosis in model membrane systems. You will also investigate the effect of solute concentration on water potential as it relates to living plant tissues. Objectives: At the completion of this AP laboratory, you should be able to: Describe the mechanisms of diffusion and osmosis. Describe how solute size and molar concentration affect the process of diffusion through a selectively-permeable membrane. Describe the relationship between solutions that are hypotonic, hypertonic, or isotonic. Design an experiment to demonstrate water potential.

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Cuvette

SOTM LAB: C7 I: TEACHER NOTES & GUIDELINES TITLE OF LAB: Chemical Kinetics: Concentration vs. Reaction Rate DEVELOPERS OF LAB: Michael Boms (JD814), Phillip Cameron (JD522), Gail Gold (JD889), Mark Tretter (JD580); Kathy Poncelet (JD521), Mikki Bieber (JD705), Pamela Iacovella (JD723), SOTM staff OVERVIEW OF LAB DESCRIPTION A spectrophotometer will be used to study different aspects of the kinetics of a reaction. The effect of concentration of one of the reactants will be investigated initially to explore the reaction and to introduce students to the use of the Spectronic-20 spectrophotometer. After completing the initial experiment, students will propose and design an experiment to investigate another factor which they think may affect the rate of this reaction.

chemistry

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Oxides

AP Chemistry Final Exam Version P Fall 2005 3 Free Response questions, 45 minutes CALCULATORS MAY BE USED. You will also have a periodic table, equation sheets, and the standard reduction potential table. Clearly show the method used and the steps involved in arriving at your answers. It is to your advantage to do this, since you may obtain partial credit if you do and you will receive little or no credit if you do not. Attention should be paid to significant figures. Note: For all questions, assume that the temperature is 298 K, the pressure is 1.00 atmospheres, and solutions are aqueous unless otherwise specified. Record all your work on this exam; you will only be given credit for answers showing work. NAME: PERIOD: 1 2 3 4 January 10-12, 2006

bio, cell respiration

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cellular respiration

biochemistry

Substrate-level phosphorylation

Glycolysis

Chemiosmosis

Electron transport chain

Oxidative phosphorylation

Citric acid cycle

Pyruvate decarboxylation

Nicotinamide adenine dinucleotide

bio

cell respiration

AP Biology Name _________________________ Chapter 9 Guided Reading Assignment? ? Define the two catabolic pathways: Fermentation? Cellular respiration?? Use the following terms correctly in a sentence: redox reactions, oxidation, reduction, reducing agent and oxidizing agent.??? Why is being ?reduced? equivalent to having a greater potential energy????? In cellular respiration, what is being oxidized and what is being reduced??? Label the diagram below of the electron movement with regard to the coenzyme NAD+. Use Fig 9.4.????? Why are electron transport chains an advantage to living systems??? What are the three stages of aerobic cellular respiration??? What is substrate-level phosphorylation??? Complete the chart below re: glycolysis???

AP Bio: Potato Osmosis Lab Report

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Sucrose

#AP Biology #AP Bio #Biology

Molar concentration

Potato

concentration

Mass

As visible from the data presented in the table and graph, the mass change in percent seems to decrease as the sucrose concentration increases. There seems to be minimal percent change of mass between 0.7M and 0.8M. Conclusions/Discussion After carefully recording data, we extrapolated that there is an inverse relationship between sucrose concentration and mass change. The inverse relationship is that as sucrose concentration increases, the mass change will decrease. By the conclusion, it was also concluded that the color-coded solutions had molarities of: Yellow= 0.2M Blue= 0.4M Clear= 0.6 Pink= 0.8M Green= 1M The hypothesis was supported by this conclusion.

chem

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