PASCO PS-2195 Salinity Sensor - Manual (Page 7)

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Model No.PS-2195 Experiment: Temperature Dependence of Conductivity in Dilute
7
Experiment: Temperature Dependence of
Conductivity in Dilute Aqueous Solutions
Purpose
The purpose of this experiment is to explore the relationship between temperature and
conductivity in aqueous solutions.
Procedure
1. Soak the Salinity Sensor Probe in distilled or deionized water for 5–10 minutes.
2. Prepare solutions:
• Prepare a 0.1% sodium chloride (NaCl) solution by dissolving 200 mg of NaCl in
100 ml of distilled or deionized water and then adding more distilled or deionized
water until the volume is 200 ml.
• Prepare a 0.4% NaCl solution by dissolving 800 mg of NaCl in 100 ml of dis-
tilled or deionized water and then adding more distilled or deionized water until
the volume is 200 ml.
• Prepare a 0.005 M sodium hydroxide (NaOH) solution by dissolving 200 mg of
NaOH in 500 ml of distilled or deionized water and then adding distilled or
deionized water until the volume is 1000 ml. Pour 200 ml of the solution into a
250 ml beaker.
Materials and Equipment Needed Product Number or Quantity
PASPORT Salinity Sensor PS-2195
Data Acquisition Interface and Software (See the PASCO web site at www.pasco.com)
Hot plate with magnetic stirrer
Ohaus triple-beam balance SE-8723
Base and support rod ME-9355
Graduated cylinder SE-7713
250-mL Beaker (4) SE-7702
1000-mL Beaker SE-7288
Utility (buret) clamp SE-9446
Wash bottle
Apron, gloves and goggles Per student
Sodium chloride 1000 mg
Sodium hydroxide 200 mg
Distilled or deionized water 1400 mL
The distilled or deionized
water for the samples should
be at or below room tempera
ture.
Figure 1