Brown: Team Resistance/11 June 2008

• Our goal for the day is to test out our apparatus with differing salt (NaCl) concentrations. We made 10 mL samples with the following concentrations: .001 M, .005 M, and .05 M.

           CONTROL (distilled water)       .001 M                .005 M                 .05 M
  1                 4.108 M ohms             393.7 k Ohms     264.9 k Ohms     233.5 k Ohms   
  2                 2.517 M ohms             265.5 k Ohms     266 k Ohms        26.69 k Ohms
  3                 2.934 M ohms             579.6 k Ohms     326.1 k Ohms     97.1 k Ohms

• With the exception of Trial 2 - .005 M reading, resistance dropped significantly with increasing concentrations of salt.