======Solubility of Salts======


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**Alternative titles:** How Much Can Dissolve?
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====Summary====                   
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====Procedure====  
  -Label two cups for each substance: salt, sugar, baking soda, and Epsom salt.  
  -Measure out approximately 20 g baking soda, 50 g table salt, 150 g Epsom salt, and 250 g table sugar into one cup of each pair. Record the masses.  
  -Measure 100 mL of distilled water into the second cup of each pair. Ensure the water is at room temperature.  
  -For baking soda: add one teaspoon of baking soda at a time into the cup of water, stirring after each addition until it no longer dissolves and remains visible. Note how many spoonfuls dissolved.  
  -Repeat this process for Epsom salt, table salt, and sugar, using clean spoons for each.  
  -Weigh each remaining solid cup after the experiment and subtract from the initial mass to calculate how much of each compound dissolved.  
  -Compare results to determine which substance was most and least soluble.  
  -Dispose of the mixtures in the sink and wash all equipment thoroughly.



====Links==== 
📄 Solubility Science: How Much is Too Much? - Svenja Lohner: [[https://www.sciencebuddies.org/stem-activities/solubility-limits]]\\


====Variations====
  *Repeat the experiment using different solvents such as rubbing alcohol, vegetable oil, or nail polish remover.  
  *Test solubility at different water temperatures (cold, room temperature, hot).  
  *Try other household substances like cocoa powder or flour to see which are soluble or insoluble.  
  *Record solubility data graphically to compare across different compounds.



====Safety Precautions====
  *Wash hands thoroughly after handling the materials.  
  *Do not ingest or taste any substances used in the experiment.  
  *Dispose of mixtures properly—pour down the sink with running water.  
  *Handle glassware carefully to avoid breakage.  
  *If using hot water for variation experiments, take care to prevent burns.




====Questions to Consider====
  *Which compound dissolved the most in water? (Sugar.)  
  *Which compound was least soluble? (Baking soda.)  
  *What does it mean when a solution becomes saturated? (No more solute can dissolve at that temperature.)  
  *Why do some compounds dissolve better than others? (Differences in molecular structure and bonding affect how easily water molecules can break solute bonds.)  
  *Would heating the water increase solubility? Why or why not? (Yes, because higher temperatures provide more energy to break molecular bonds and dissolve more solute.)