3 if we test potatoes in different levels of unknown

  • No School
  • AA 1
  • 12

This preview shows page 6 - 9 out of 12 pages.

3. If we test potatoes in different levels of unknown solutes, then some potatoes put in the unknown with high amounts of sucrose will become hypotonic, the ones put in the solute with low amounts will become hypertonic, and the ones put in the solute with just the right amount of sucrose will become isotonic. This experiment will test this hypothesis by allowing the potatoes to sit in the solutes and react accordingly. The Adriann Lausen Demi Dobbin AP Bio # 3 Mrs. Houseman 20 September 2019
Image of page 6

Subscribe to view the full document.

potatoes are expected to react to the solutes differently and become either isotonic, hypotonic, or hypertonic. Methodology: This lab will need help setting up by teacher or supervising adult. The supervisor will set our 5 unknown solutes that each have different amounts of sucrose in it. The 5 different ones will be color coded allowing students to keep track of their data. 100ml of each solute will be measured out and put into plastic cups. Then potatoes will be cut up into even cubes each weighing .5g. One cube of potato will be added to each solute and will sit for 42 hours. After the allotted 42 hours the potato will be weighed again to see if it either gained, lost, or stayed the same in weight. Results: The question that was answered in this lab was which potatoes become either hypo, iso, or hypertonic. The green and red became hypotonic; orange and blue were isotonic; yellow was the only hypertonic. The green solution increased the potato weight by .1, the orange solution neither increased or decreased the potato weight, the red solution increased the potato weight by .1, the yellow solution decreased the potato weight by .1, and the blue solution neither increased or decreased the potato weight. All the data can be viewed below in table 1. Tables and Figures: Table 1: Solution Potato Weight Before Potato Weight After Tonicity Green .5 .6 Hypotonic Orange .5 .5 Isotonic Red .5 .6 Hypotonic Yellow .5 .4 Hypertonic Blue .5 .5 Isotonic Discussion: Based on the data, it can be concluded that the green and red solution had a high amount of sucrose in it, the orange and blue solution very minimal or not amount of sucrose in it, and the yellow solution had a very minimal amount of sucrose in it. These results did jive with the Adriann Lausen Demi Dobbin AP Bio # 3 Mrs. Houseman 20 September 2019
Image of page 7
expected results in the sense that the potatoes were expected to react differently to the different solutes. In future experiments it would be interesting to know if the potatoes would react differently to salt than sugar or cane sugar versus regular sugar. Error Analysis: Some sources of error that could have occurred in this experiment would be not stirring the solutes enough before pouring it into the other plastic cups. This could be a source of error because it could sway how much of the actual mixed solute was being tested on the potato, if it was not mixed enough then the potato was really not exposed to the full thing and the data could be swayed by that. This could be fixed by just making sure that the solutions are stirred completely before using them in the lab.
Image of page 8

Subscribe to view the full document.

Image of page 9

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes