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======Acid In The Eye======


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**Materials: **{{$demo.materials_description}}\\
**Difficulty: **{{$demo.difficulty_description}}\\
**Safety: **{{$demo.safety_description}}\\
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**Categories:** {{$demo.categories}}
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**Alternative titles:**
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/* SUMMARY - Required                                                                                  */
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====Summary====                   
{{$demo.summary}}


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/* PROCEDURE - Optional                                                                                */
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====Procedure====  
  - Place egg white in the Petri dish.  
  - Position the dish on an overhead projector or under a document camera (optional).  
  - Add several drops of a strong acid (such as hydrochloric, sulfuric, or nitric acid) to the egg white and observe it immediately become opaque.  
  - Attempt to rinse with water or sodium bicarbonate solution and note that the damage cannot be undone.


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====Links==== 
Eye Safety Demo - All Things Chemistry: 
{{youtube>wWv4QAEMb4o?}}\\
📄 Acid in the Eye - Flinn Scientific: [[https://www.flinnsci.com/api/library/Download/a85735243805438b84ffa3fb05d121d7]]\\
📄 Acid in the Eye - Flinn Scientific: [[https://www.flinnsci.com/api/library/Download/a85735243805438b84ffa3fb05d121d7]]\\

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====Variations====
  * Try using acids of lower concentrations (though the effect is less dramatic).  
  * Repeat the experiment with sodium hydroxide solid or solution.  
  * Use different visual aids (such as slow-motion video or magnified projection) to highlight the denaturation process.


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/* SAFETY PRECAUTIONS - Required                                                                       */
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====Safety Precautions====
  * Wear chemical splash goggles, chemical-resistant gloves, and a chemical-resistant apron.  
  * Perform nitric acid demonstrations in a fume hood, as it is toxic by inhalation.  
  * Do not eat or handle egg whites as food once used in the lab—they are treated as chemicals.  
  * Handle all acids and bases with care; they are corrosive and can cause severe burns.


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====Questions to Consider====
  * Why does the egg white become opaque when acid is added?  
  * How does denaturation change protein structure and function?  
  * Why can the damage not be reversed by rinsing?  
  * What does this experiment teach about the importance of wearing goggles in the lab?  
  * How is this related to real-life chemical exposure in the eyes?


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