Potato Osmosis Lab Report
Osmosis and Scientific Method Lab Report
Abstract
The purpose of the lab is to see how different size potatoes have faster water movement depending on the concentration of sucrose it was placed in. We had two sized potatoes, 6g and 10g, and placed each in three different dilutions of sucrose at 0.5M, 0.1M, and 0.05M. We also placed a 6g and 10g potato piece in water to act as a control. Based on the weight percent change over 60 minutes, the 6g potato piece had faster water movement than the 10g. This confirms out hypothesis that smaller potato pieces will have a faster rate of water movement.
Introduction
Osmosis is the diffusion of water across a selectively permeable membrane. Water diffuses across a membrane from the region …show more content…
We labeled each beaker as either the water control, 0.5M sucrose, 0.1M sucrose or 0.05M sucrose. We then placed the weighing boat on the electronic balance, zeroed the balance, then placed the potato pieces until four pieces were exactly 6g and four were exactly 10g. We then filled two beakers with 100mL of water to act as the control. For the proper dilutions of 0.5M, 0.1M, and 0.05M, we respectively filled one beaker with 100mL sucrose, one beaker with 20mL sucrose and 80mL water, and the last beaker with 10mL sucrose and 90mL water. In order to properly measure the correct amount of sucrose, we used the 100mL graduated cylinder and added the calculated amount of sucrose to each water beaker. We then placed the 6g potato piece in the control, waited 30 seconds before placing the 10g potato piece in the control, waited 30 seconds before placing the 10g potato piece in the 0.5M beaker, and so on. After 10 minutes, we used the forceps to retrieve the 6g potato from the control, blotted it with a paper towel, and used the electronic balance to weigh it. We did this for each potato piece in 10 minute intervals until 60 minutes was …show more content…
The only data that somewhat disproves this is the control because the 10g increased by 8.00% and the 6g increased by 6.67%, but I don’t know how accurate that is because controls are supposed to remain the same weight throughout the 60 minutes (A Laboratory Manual for BI 107, 2012). If we neglect that, then the only other data that disproves this is that at 0.1M sucrose, the 10g piece had 1.00% increase over the 6g piece, but that may have changed if we continued the experiment for a longer time. We also learn from the data that at 0.5M sucrose, the potato piece is hypotonic because it lost weight, but at the control (water), 0.1M sucrose, and 0.05M sucrose, the potato piece is hypertonic because the potato pieces gained weight. There are some discrepancies in the data as seen by the control, but overall it supports our hypothesis of the smaller potato piece having a faster rate of water
Abstract
The purpose of the lab is to see how different size potatoes have faster water movement depending on the concentration of sucrose it was placed in. We had two sized potatoes, 6g and 10g, and placed each in three different dilutions of sucrose at 0.5M, 0.1M, and 0.05M. We also placed a 6g and 10g potato piece in water to act as a control. Based on the weight percent change over 60 minutes, the 6g potato piece had faster water movement than the 10g. This confirms out hypothesis that smaller potato pieces will have a faster rate of water movement.
Introduction
Osmosis is the diffusion of water across a selectively permeable membrane. Water diffuses across a membrane from the region …show more content…
We labeled each beaker as either the water control, 0.5M sucrose, 0.1M sucrose or 0.05M sucrose. We then placed the weighing boat on the electronic balance, zeroed the balance, then placed the potato pieces until four pieces were exactly 6g and four were exactly 10g. We then filled two beakers with 100mL of water to act as the control. For the proper dilutions of 0.5M, 0.1M, and 0.05M, we respectively filled one beaker with 100mL sucrose, one beaker with 20mL sucrose and 80mL water, and the last beaker with 10mL sucrose and 90mL water. In order to properly measure the correct amount of sucrose, we used the 100mL graduated cylinder and added the calculated amount of sucrose to each water beaker. We then placed the 6g potato piece in the control, waited 30 seconds before placing the 10g potato piece in the control, waited 30 seconds before placing the 10g potato piece in the 0.5M beaker, and so on. After 10 minutes, we used the forceps to retrieve the 6g potato from the control, blotted it with a paper towel, and used the electronic balance to weigh it. We did this for each potato piece in 10 minute intervals until 60 minutes was …show more content…
The only data that somewhat disproves this is the control because the 10g increased by 8.00% and the 6g increased by 6.67%, but I don’t know how accurate that is because controls are supposed to remain the same weight throughout the 60 minutes (A Laboratory Manual for BI 107, 2012). If we neglect that, then the only other data that disproves this is that at 0.1M sucrose, the 10g piece had 1.00% increase over the 6g piece, but that may have changed if we continued the experiment for a longer time. We also learn from the data that at 0.5M sucrose, the potato piece is hypotonic because it lost weight, but at the control (water), 0.1M sucrose, and 0.05M sucrose, the potato piece is hypertonic because the potato pieces gained weight. There are some discrepancies in the data as seen by the control, but overall it supports our hypothesis of the smaller potato piece having a faster rate of water