Osmosis lab report Essay Example

Osmosis lab report Paper If the solution has a higher water potential than he potato cores, there will be net movement of water into the potato pieces. Therefore, potato cores in less concentrated solutions will gain more weight than the potato cores in more concentrated solutions. Null hypothesis: Different sodium chloride concentrations in solutions have no effects on the mass of the potato cores. 3. Analysis of Variables Type of Variable Details Notes on how variable is manipulated / measured / controlled Independent (manipulated) Sodium concentration of the solutions Different amount of salt (sodium chloride) is put in the solvent (water) to make . MM, 0. MM, MM, MM, 1. MM solutions. Dependent (responding) Final mass of potato pieces Measured at the end of the experiment with a ruler (in mm) and an electronic balance (in gram). Controlled variables Volume of solutions Each solution is mixed with 300 CM of solvent (water) and then divided into two beakers with 150 CM in each. Room temperature All beakers are kept in the same room, so that they all experience the same conditions. Type of potato All the potato pieces come from potatoes bought at a store, packaged together. Initial sizes of potato pieces Measured before putting the pieces into the solutions with a ruler (in mm) and an electronic balance (in gram). Temperature of the solutions All the beakers were kept in the same place, so the solutions experienced the same conditions. Size and material of the beakers The 500 ml beakers were made of glass. Duration of time the potato is left in the solutions The potato pieces were left in the solutions overnight, approximately 10 hours. 4. Background Information Osmosis can be defined as the movement of water across a semi-permeable membrane from a region of high water concentration to a region of low water incineration. The semi-permeable membrane allows small particles through it but does not allow large particles such as sodium chloride. Osmosis will continue until a state of equilibrium is reached i. E. There is no area with a higher or lower concentration than another area. To land plants, water and osmosis are vital as they play leading roles in the structural support of a plant, they facilitate transport of materials, etc. We will write a custom essay sample on Osmosis lab report specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Osmosis lab report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Osmosis lab report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Lack of water will lead to a plant wilting and possibly dying. When a cell is in a hypotonic solution (more solute concentration than the cell), eater will move from the hypersonic solution (less concentrated) to the hypotonic solution via the process of osmosis. In this experiment, the movement of water in and out of potato cells left in sodium chloride solution will be investigated. The sodium chloride molecule is too large to be passively transported across the cell membrane, so only net movement of water will happen without any input of energy. Osmosis Lab Report Essay Example Osmosis Lab Report Paper I then compared the three volume measurements and provided observation. The ext experiment was to determine the effects of salt concentration on bacterial growth. The tubes of broth were labeled as directed and antiseptically inoculated with the appropriate organism, and incubated for 24-rash. After incubation I observed the tubes for the presence or absence of growth. Methods 1. Start with a graduated beaker, or some other container marked at known volume levels. Fill the beaker or measuring cup to 200 ml with water. . Set that measuring device aside for later. 3. Then get a cup and place the raw egg in the cup and fill it with vinegar until the egg is covered. Let sit in vinegar for 24 hrs. . After soaking for 24 hrs remove the egg and rinse with water to remove any remainder of the egg shell. 5. Place egg in the designated cup with water and measure volume. 6. Record the starting volume of the egg (final volume)-(starting volume)=egg volume. 7. Then place the egg in another cup an d fill it with corn syrup until egg is covered. Let sit for 24 hrs. 8. After soaking for 24 hrs remove the egg and rinse with water. 9. Place egg in the designated cup with water in it and measure volume and record volume. 10. Then place the egg in another cup and fill with water until egg is covered. Let it for 24 hrs. 11. After soaking remove the egg and place in the designated cup with water and measure and record volume 12. Compare the three volume measurements. Results The vinegar resolved the shell of the egg and some of the vinegar when into the egg by osmosis. The egg was bigger and really slimy and had no shell. Egg volume results: (IF) 200 (SF) 185 = 15 The egg has shrunk in the corn syrup, it looked like it was deflated and you could see the yolk. Egg volume results: (IF) 237-(SF) 200= 37 The egg got much bigger when placed into the water, the membrane went from very loose to really tight. It looked like it was back to the size it was before it was placed in the corn syrup. Egg volume results: (IF) 112-(SF) 200= 88 Interpretation The vinegar was a hypotonic solution and the egg was hypersonic solution. We will write a custom essay sample on Osmosis Lab Report specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Osmosis Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Osmosis Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer The vinegar went from an area with lesser concentration to an area with greater concentration. The membrane of the egg in the vinegar is impermeable leaving the membrane very tight and didnt let mulch liquid through. When placed in the corn syrup instead of the egg being a hypersonic solution the corn syrup was and the egg was hypotonic. So the egg when through osmosis once again but he liquid went outside the membrane because there was lesser concentration outside and higher inside. The membrane was permeable and the corn syrup being the solvent increased because the solute of the egg diffused. When placed in the water, the water being hypotonic diffused into the egg, and the egg hypersonic got bigger. The membrane was very permeable to the water and osmosis occurred. There was greater concentration in the water and lower in the egg and that why osmosis occurred. The water was the solvent and the egg was the solute. In conclusion the eggs membrane has a different reaction to every liquid that it is in. Osmosis Lab Report Essay Example Osmosis Lab Report Paper The process of Natural Importance Introduction Osmosis is when a fluid passes threw a semi permeable membrane. Moving from an area in which a solute such as salt is present in low concentrations to an area in which the solute is present in high concentrations. There are three types of osmosis: hypersonic is when there is high concentration and the cell has no water inside it (shrunk), hypotonic is when there is low concentration and the cell has swelled up or in other words has a lot of water inside it, isotonic is when he water comes in and out of the cell and stays the same shape. All the carrots we put in the salt solution was from the same carrot, the 0% carrots mass was 6. Grams, the 5% salt solution is 14. 6 grams, the 10% salt solution is 6. Grams and the salt solution is 6. 8 grams. My hypothesis was that the carrot would shrink and be very small and gooey, but it was wrong. The controlled variable in this lab is the carrot and time, the manipulated variable is the salt solution, and the resulting variable in this lab is what happens to the carrot. Materials and Methods: Salt solution ( 0-15%) . Carrot pieces from same Carrot( Cut carrot in half if needed) . 4 Beakers . Water Triple beam balance First of all you need to have water with salt, 4 beakers with the solution inside, you also need to find out the weight of the carrot when you put it on the triple beam balance, After that you need to put the carrot in the beaker for minutes, then take it out of the beaker and find out its final mass when you re put it on the triple balance beam thing. Qualitativ e The results for the osmosis lab is that the 0% salt solution with the carrot inside ass increased a lot. We will write a custom essay sample on Osmosis Lab Report specifically for you for only $16.38 $13.9/page Order now We will write a custom essay sample on Osmosis Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer We will write a custom essay sample on Osmosis Lab Report specifically for you FOR ONLY $16.38 $13.9/page Hire Writer Making it the most changed mass carrot in all of the solutions. The 5% salt solution carrot mass also increased quite a bit but not that much, this is low concentration or hypotonic in other words. The 10% salt solution also increased, but this carrot we cut it in half before we put it in the beaker because it was too big to fit. The 15% salt solution also increased a lot! Not that much actually but all of them increased or in other scientific words, it used low concentration or the cells inside the carrot started swelling. Quantitative Discussion My hypothesis was very wrong, I thought it WOUld be high concentration not low, Osmosis is the diffusion of molecules threw semi permeable membrane, there is only 1 part of the cell that is responsible for maintaining homeostasis( Plasma membrane). The 0% salt solution has a higher concentration, the 10% had a lower concentration of water. Found out from the lab that we did in class. I thought that the carrot cells would absorb water because it is the same solution. Think that they salted their meat to kind of keep it fresh and free of bacteria. Supermarkets spray vegetables with water so it can stay fresh. The independent arable is salt, the dependent variable is will the carrot grow or stay the same shape? The control variable is a carrot. The difference between the lab results and my hypothesis is that the carrot got bigger and swelled up. Conclusion learned that when you put a carrot in salty water, it well swell. Also learned that water with salt will make any fruit swell because almost all fruits are low concentration when they are in water with salt or other than that they are isotonic. I also learned that my hypothesis is false and that we should always love you Mrs Gender!!! Citations our new text book and our lab paper.