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PSOW-4-Investigating SA-V with agar and diffusion

Page history last edited by Jay 12 years, 11 months ago

Practical 4 (SA/V)

 

Purpose: Determine affect of SA/V ratio on diffusion out of “cells”

Criteria:  DCP (formative )

Length:   1 hour (max)

Date (time): 

Cohort: 2013 exams

 

 

Objective:

Use conductance as ions leach from agar cubes to determine affect of SA/V on movement in/out of "cells"

 

 

Preparation:

  • add 12 g powdered agar per Liter of distilled water
  • heat while stirring continuously
  • add 100 g NaCl per Liter and mix
  • heat until agar is clear - not cloudy or until boiling
  • remove from heat and stir for 5 minutes
  • pour into dishes and pans

 

 

Method:

[developed by students]

 

 

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