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/* TITLE - Required                                                                                    */
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======Universal pH Test Paper======


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/* GREY BOX INFORMATION - Required                                                                     */
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<WRAP right box>
**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:** Universal Indicator Paper
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/* SUMMARY - Required                                                                                  */
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====Summary====                   
{{$demo.summary}}


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/* PROCEDURE - Optional                                                                                */
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====Procedure====   
  - Pour small amounts of each solution into a container or onto a white tile.  
  - Dip one fresh universal pH test strip into each solution and immediately compare the color to the pH chart.  
  - Record the observed pH and resulting color in the data chart.  
  - Repeat for each solution, using a new strip each time.


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/* Links - Optional                                                                                    */
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====Links==== 
Testing Substances with pH Paper - teacherhoyles: 
{{youtube>3yfIHGlG6fE?}}\\
📄 Universal pH Test Paper Experiment - Precision Laboratorie: [[https://www.preclaboratories.com/universal-ph-test-paper-experiment/]]\\


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/* VARIATIONS - Optional                                                                               */
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====Variations====
  * Test additional household products, such as fruit juices, sodas, or shampoos.  
  * Compare universal pH paper with other pH papers to see differences in sensitivity.  
  * Try testing environmental samples like rainwater, pond water, or soil extracts.


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/* SAFETY PRECAUTIONS - Required                                                                       */
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====Safety Precautions====
  * Wear safety goggles and gloves when handling strong acids or bases. 
  * Avoid skin or eye contact with corrosive solutions.  
  * Work with an adult when handling hazardous materials.  
  * Do not taste or consume any test substances.  
  * Wash hands thoroughly after the experiment.  
  * Dispose of solutions according to local safety guidelines—small household samples can generally be diluted with plenty of water before disposal.


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====Questions to Consider====
  * Which household items were the most acidic? Which were the most basic?  
  * Why do strong acids and strong bases produce more vivid color changes compared to weak ones?  
  * How does universal pH paper differ from more precise pH testing methods?  
  * Why does distilled water usually show a neutral pH of 7?  
  * Could the pH of some products vary depending on the brand or formulation?


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/* DEMONSTRATION INFORMATION - Required                                                                */
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/* Complete information in the Demonstration Info box below, following instructions exactly. */