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Past Exam for CHEM 14BL - General and Organic Chemistry Laboratory I with Russell at UC Los Angeles (UCLA)

Exam Information

Material Type:Final
Professor:Russell
Class:CHEM 14BL - General and Organic Chemistry Laboratory I
Subject:Chemistry
University:University of California - Los Angeles
Term:Fall 2004
Keywords:
  • Pre-Lab Study Questions
  • Concentration
  • Buffer Solution
  • Assumptions
  • Phase Changes
  • Experiments
  • Homogeneous
  • Total Number
  • Phase Equilibrium
  • Solution pH
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Sample Document Text

Chemistry 14BL Final Study Questions Answer Key During the exam you will be allowed to use a calculator, your lab notebook, your lecture guides and any hand-written materials that you want. Printed study questions and/or answers are not allowed. Review the pre-lab study questions even if they were not assigned. You should be able to answer all these questions now. Review the sidebar questions in the experiments. Review the experimental procedures. Acids, Bases, and Buffers: 1. How many milliliters of 0.0400 M Ba(OH) 2 are required to reach the equivalence point with 15.0 mL of 0.100 HCl? Answer: Barium hydroxide furnishes two equivalents of hydroxide in solution for each mole of barium hydroxide that you start with, and HCl donates one mole of protons/mole of acid. Thus the concentration of OH - = 0.0800 N. Since equivalents of acid = equivalents of base, (X mL) (0.0800 N) = (15.0 mL)(0.100 N) and X = 18.75 mL. 2. What volume of 0.250 M H 2 S...

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