Why Does Lettuce Crisp in Water but Wilt in Vinegar?

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    Chemistry Food
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Discussion Overview

The discussion centers on the phenomenon of lettuce becoming crisper when soaked in water and wilting when exposed to vinegar. It explores the underlying mechanisms related to osmosis and turgor pressure in plant cells.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification

Main Points Raised

  • One participant references a chemistry textbook that notes the effects of water and vinegar on lettuce but seeks further explanation.
  • Another participant introduces the concept of osmosis, explaining that water diffuses into plant cells when the external concentration of dissolved substances is lower, leading to increased turgor pressure and crispness.
  • The same participant notes that when the concentration of dissolved substances is higher outside the cell, water diffuses out, resulting in decreased turgor pressure and wilting.
  • A later reply provides a link to a Wikipedia article on plasmolysis, suggesting further reading on the topic.

Areas of Agreement / Disagreement

Participants generally agree on the role of osmosis in the crisping and wilting of lettuce, but the discussion does not delve into potential nuances or alternative explanations.

Contextual Notes

The discussion does not address specific conditions or variables that may affect the osmosis process, such as the concentration of vinegar or the duration of exposure.

Who May Find This Useful

Individuals interested in plant biology, chemistry, or culinary science may find this discussion relevant.

phat2107
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I was reading in my chemistry textbook that lettuce gets crisper when soaked in water and wilts quickly when drenched in vinegar.

Can someone explain this to me, the book does not give a clear reason as to why this happens.
 
Chemistry news on Phys.org
http://en.wikipedia.org/wiki/Osmosis

Basically if the concentration of dissolves substances in the exterior of the cell is less than the concentration of dissolved substances in the interior of the cell, water diffuses into the cell increasing its turgor pressure (in the case of plant cells, making them more crisp). If the concentration of dissolved substances is greater outside of the cell, water diffuses out of the cell making the cell lose turgor pressure (making it wilt).
 
Thanks that makes it clearer
 

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