Natural Salt Solutions 2: Analysis of Seawater Overview Getting Started Techniques Procedure FAQ Full Lab Manual Introduction & Goals Chemistry & Background Key Questions Prelab Problems Safety Procedure In Your Write-up Appendix Experiments Index ChemLab Home		Key Questions The ion exchange chemistry of this week's experiment is the same as last week's, so last week's key questions still apply. In addition, think about the acid-base chemistry and techniques of this week's experiment by asking yourself the following questions: 1. How can I be sure that I convert every cation in the sea water sample to a hydrogen ion and then collect every H3O+ for analysis? 2. What must I do to maintain the concentration of the NaOH solution used for titration? 3. How can I make my titrations reproducible, so I can believe the value I obtain? 4. How can I evaluate the uncertainty of my results?
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