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Lecture Notes for CHEM 141 - INTRO CHEM:STRCT/DNMCS/SNT LAB at Richmond (UR)

Notes Information

Material Type:Class Note
Professor:Staff
Class:CHEM 141 - INTRO CHEM:STRCT/DNMCS/SNT LAB
Subject:Chemistry
University:University of Richmond
Term:--
Keywords:
  • Naoh Solution
  • Hygroscopic
  • Immediately
  • Percent Error
  • Mass Percent
  • Concentration
  • Combination
  • Confirmation
  • Concentrated
  • Determination
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Chem 141 Titration Lab Lecture Notes Samuel A. Abrash Q: What is the purpose of this experiment? The purpose of this experiment is to explore two techniques by which we answer the question: How much? One technique we'll be using to answer this is weighing. The other is titration. Q: What do we have to weigh? You're going to weigh two different substances, NaOH, sodium hydroxide, on a top loading balance, and KHP, potassium hydrogen phthalate, on an analytical balance. Q: Two different balances? What's the difference? The analytical balance is a much more precise instrument, allowing mass determinations to 0.0001 g. The top loading balance typically allows masses to be determined to only 0.01 g. Thus the analytical balance is 100 times more precise than the top loading balance. Q: Why do we use two balances with two different precisions? You need precise determination of the mass of KHP, because weighing is the only method you'll use to quantify ...

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