Demonstrating Osmosis lab - O S M O S I S I N P OTATO E S...

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O S M O S I S I N P O T A T O E S | 1 Demonstrating Osmosis Ramnik Kaur Lalli Thistletown Collegiate Institute March 20, 2017
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O S M O S I S I N P O T A T O E S | 2 QUESTION How does solute concentration influence the direction of osmosis? PREDICTION The solute in the NaCl solution will have a lower concentration (hypertonic) during osmosis, while the solute in the distilled water will have a higher concentration (hypotonic) during osmosis. Therefore, I believe the direction of osmosis will be going out the cell because of the NaCl solution, but in the distilled solution the direction of osmosis will be going into the cell. MATERIALS 250 ml beakers (2) 10% NaCl solution Distilled or filtered water Potato (1) Kitchen knife (1) Scale (1) Tape Pen/pencil Paper towels Graduated cylinder (1) Crucible thongs (1) Watch glass (1) Clock PROCEDURE
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O S M O S I S I N P O T A T O E S | 3 1. Obtained two 250ml beakers. 2. Filled one beaker with 100ml of 10% NaCl solution. With tape labeled each beaker accordingly. 3. Prepared three potato strips of equal size, shape, and mass. Recorded initial volume on observation chart. 4. Recorded quantitative observation of size, mass, and qualitative observation such as colour, feel, rigidity on the observation chart provided. 5. Placed one strip in each beaker and used the third strip as “controlled.” 6. Weighted the allocated amount of time (about 15 minutes) before pulling the strip out. 7. Dried wet strips using paper towel, before recording final observations. 8. Recorded both quantitative and qualitative observations after osmosis. 9. Analyzed and compared sub-merged strips against the controlled. 10. Cleaned up work area, by wiping desk and equipment. OBSERVATIONS Quantitative Qualitative Beaker Initial volume of solutio n (ml) Final volume of solutio n (ml) Mass (g) of strips before osmosi s Mass (g) of strips after osmosis Appearance of texture, colour, rigidity etc. before osmosis Appearance of texture, colour, etc. after osmosis
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  • Fall '14
  • Mr.Fairwe
  • Biology, Osmosis, NaCl solution, Ramnik Kaur Lalli, 0.027g, 0.031g

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