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Properties of Matter: Investigation 4 –

PostLab

 

 

 

 

 

 

 

ANALYZE IT

Complete the Analysis Questions in your SDR then discuss them as a class. 

Note: Questions marked with a triangle (∆) are included to enrich your understanding. These questions do not appear in your SDR. 

  •  Which property of compounds did you determine? 
  • Which compounds were acidic? 
  • Which compounds were basic? 
  • Which compounds were neutral? 
  •  Were there differences in the degrees of acidity or basicity of the compounds? 

Consider some of the methods they used in your investigation of pH.

  • ∆ Why did you test the pH of water? What was the pH of water? 
  •  Calcium carbonate was a compound you investigated previously. Why do you think it was not included in this investigation of pH? 

 

What are some of the broader conclusions that you may draw from the investigation of pH as well as the other investigations of the Properties of Matter CELL?

  • ∆ Why is pH a valuable property to test when working with compounds? 
  • ∆ Do compounds composed of similar elements have a similar or dissimilar pH? 
  •  Do all liquid compounds have the same pH? Why or why not? 
  •  Do all solid compounds have the same pH? Why or why not? 
  •  Based on all of the investigations and experiments in this Core Experience Learning Lab, describe how you would determine the identity of an unknown substance.

GET FOCUSED

Complete the following Focus Questions in your SDRs then discuss them as a class. 

  • Why is pH a valuable property to test when working with compounds? 
  • Do compounds composed of similar elements have a similar or dissimilar pH?