1) The osmolarity of Elodea is approximately 150 m0smental so own results of the

Question

1) The osmolarity of Elodea is approximately 150 m0smental so own results of the plant cells, classify the two pressure and tonicity. experimental solutions according to their osmotic 400 mOsm NaCl is osmotic and osmotic and tonic to Elodea. tonic to Elodea. 400 mOsm Urea is_ 2) Did your experimental results support our hypotheses (on page 5 of this lab)? If not, provide a possible explanation. 3) Urea is a larger cell membrane at a faster rate: urea or water?Wa molecule than water. Based on this information, which would diffuse through the urea concentration in Elodea cells is much less than 400 mOsm. When Elodea cells are placed in 400 mOsm urea solution, a urea gradient exists which would compel urea to diffuse membrane and into the cell until the urea concentration gradients are equal. Assuming this 4) The happens, did you expect osmosis to occur? Explain your reasoning Describe the osmotic movement of water (if any) that occurred during the first minute that Elodea was in 400 mOsm urea solution. 5) 6) Describe any osmosis changes that occurred during the remainder of ten minutes of observation. your answers from questions 3-6 to explain the paradoxical change in Elodea cells during our observation. Be sure to include diffusion rate, molecule size, osmosis, and diffusion in your 7) Use response. You may use diagrams to assist in your explanation.

Explanation / Answer

1. 400 mOsm NaCl is hyperosmotic and hypertonic to elodia

400mOsm urea is hyperosmitic and hypertonic to elodia

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