Skyline College A.J. Bates Professor of Chemistry

     Chemistry 192 - Introductory Chemistry - Spring 2014

Chem 210 - General Chemistry 1Chem 235-238 - Organic Chemistry 2 Chem 220 - Lab Manual & Extra Practice ProblemsScience Lecture Series Gay Straight Alliance

Laboratory Information

  • Standard PRELAB Assignment (for experiments fro the laboratory manual)
    • PURPOSE
    • PROCEDURE SUMMARY / Strategy
      • One or two paragraphs explaining the procedure, not a listing of steps
    • ADVANCE STUDY ASSIGNMENT (from the lab manual)
  • Experiment #5: Simplest Formula of a Compound Mini-Report Guidelines
    • Original Data
    • Reorganized / Formal Data Presentation (if necessary)
    • Formal Calculations - Calculations should be properly labeled and include units, cancelling of units, and proper application of significant figures rules.
    • Clear statement of the empirical (simplest) formula of magnesium oxide based on your calculations.
    • Show a prediction of the formula based on expected charges of magnesium and oxide ions.
    • Discuss deviation for your calculated ratio from the predicted ratio. Provide specific reasons why yours may have deviated in the direction that it did.
  • Experiment #6: Analysis of a Hydrate Report Guidelines
    • DATA / CALCULATIONS / RESULTS
      • Original Data
      • Reorganized / Formal Data Presentation (if necessary)
      • Formal Calculations - Calculations should be properly labeled and include units, cancelling of units, and proper application of significant figures rules
      • Clear statement of the formula of the unknown hydrate based on your calculations
      • Name the compound based on the formula you have determined
    • DISCUSSION / ERROR ANALYSIS
      • Present the complete, balanced equation for the dehydration reaction based on the formula you determined for your unknown in part 1 of the experiment.
      • Report the known formula for the hydrate. The actual hydrate formulas were:
        • BaCl2• 2 H2O
        • CuSO4 • 5 H2O
        • MgSO4 • 7 H2O
      • Discuss deviation for your calculated ratio from the predicted ratio. Provide specific reasons why yours may have deviated in the direction that it did.
      • Explain your observations related to the behavior of the hydrate that you observed in part 2 of the experiment.
    • CONCLUSIONS
      • Make appropriate conclusions for Part 1 & Part 2.
    • ANSWERS to the ADVANCE STUDY QUESTIONS