LAB EXERCISE: Diffusion and Osmosis Laboratory Objectives After completing this lab topic‚ you should be able to: 1. Describe the mechanism of diffusion at the molecular level. 2. List several factors that influence the rate of diffusion. 3. Explain why diffusion is important to cells. 4. Describe a selectively permeable membrane‚ and explain its role in osmosis. 5. Define hypotonic‚ hypertonic‚ and isotonic in terms of relative concentrations of osmotically active substances. 6. Discuss
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The Effects of Osmosis and Diffusion The experimentation of last week’s lab was in order to test the many effects of diffusion and osmosis amongst four experiments. One such experiment was testing the effects of molecular weight on diffusion in relation to the use of Agar. The methods performed included the use of two acids‚ HCl and acetic acid. Both acids were placed into an Agar-filled dish and‚ over increments of 15 minutes‚ data collection was taken based off the diffusion rate and the
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ABSTRACT The effect of co-factor (MgSO₄) and the nature of substrate on the rate of cellular respiration in yeast were determined using two different set-ups. In the first set-up‚ two test tubes were used where one contains 7m and the other with 7 mL 0.2M MgSO₄ and both containing 7mL 10% yeast suspension. Here‚ data shows that the H₂O mixture showed higher amount of CO₂ evolved than MgSO₄. In the second set-up‚ six Smith fermentation tubes were used each containing different 15mL solution (starch
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Osmosis and Diffusion Title: Diffusion and Osmosis AP Lab 1 Purpose: The purpose of this activity is to determine the effects of a selectively permeable membrane on diffusion and osmosis between two solutions separated by a membrane. Hypothesis: Procedures: In lab manual Material: In lab manual Background Information: Data: Table 1 Diffusion of glucose and iodine. | Color | Glucose | Time | Dialysis Bag | Beaker | Dialysis Bag | Beaker | Start | | | | | 30 minutes
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Children should not have screen time taken away from them it’s apart of everyday life. I feel as if certain television shows help toddlers learn things also smaller childer(ages 5-9). There are all types of networks created just for them. There’s:PBS Kids‚ Channel thirteen‚ Sprout‚ Nick jr. etc. Also they have websites for children too. ABC mouse helps so much. My little brother uses it on a daily‚ and his vocabulary has improved so much just to be almost two years old. Most parents feel as
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higher concentration ( hypertonic ) to a region of lower concentration ( hypotonic solution ) through a cell membrane or other semi-permeable membrane until an equilibrium is reached. It is a special case of diffusion called “ passive transport “ which means no energy is required. Diffusion is the movement of a substance by which the molecules move from a region of higher concentration to a region of lower concentration. Aim Our aim of the experiment was to observe and investigate the process
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Diffusion And Osmosis Abstract In this Diffusion and Osmosis lab a total of three experiments were performed. For experiment 5.1 we investigate diffusion through a selectively permeable membrane and the many factors that influence the rates of diffusion. In experiment 5.2 we investigate both animal and plant cells in different molar solutions and the different osmotic behaviors within the cells. In experiment 5.3 we test the osmolarity of plant cells through the usage of potato tuber cells
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some people believe that kids should not have phones in school‚ it may actually be argued that kids should have phones in school. Here are some reasons. For one reason‚ kids will get on their phone if they don’t have a laptop for research. Secondly‚ is that kids can call a parent if they need to. The last reason‚ if the kids don’t have friends that will play with them‚ they can get on their phone for entertainment. First of all‚a strong reason is if you don’t have a laptop or pc(pc means personal
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or sister off the elementary school bus‚ and schools would have to provide a snack for the children because it would interfere with families early dinner time. Can the school afford this? It is very important for families to have family time because families should have a strong bond. Also‚ kids should have time to get out their energy and have fun instead of learning for nine hours a day. Here are my reasons on why the School Board should not change school hours. My first reason on why we shouldn’t
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Should teachers be allowed to have guns at school? No guns should be allowed on school campus period. Teachers should not be allowed to have guns in school‚ because it would risk more lives at school. It probably would make students feel even more unsafe. Teachers should not be allowed to have guns‚ because what if the teacher forgets to lock the gun securely and what if one of the teachers take their anger out and shoot his or her student. First of all teachers shouldn’t have guns at school period
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