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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

Содержание PasPort PS-2195

Страница 1: ...linity Sensor PS 2195 Salinity Sensor Probe 10 X Conductivity Temperature 699 11064 Recommended Items PASPORT Extension Cable PS 2500 PASCO Interface Catalog or web site Data Acquisition Software Cata...

Страница 2: ...ride In the 1970 s salinity was redefined as the conductivity ratio of a water sample to a standard potassium chloride KCl solution Usage One use for the sensor is to explore the salinity of local wat...

Страница 3: ...b site at www pasco com for information 1 When you connect the Salin ity Sensor to the computer through a PASPORT inter face the PASPortal window will launch automatically if DataStudio is not already...

Страница 4: ...ou will need reagent grade sodium chloride salt a liter of distilled or deionized water a stir rod and a container with accurate volume markings Pour 500 milliliters mL of distilled water into the con...

Страница 5: ...on the specific dissolved solids and can vary between 0 40 and 0 96 depending on the dissolved solids A value of 0 65 is used as an approximation if the dissolved solids are not known As an example TD...

Страница 6: ...f PASCO scientific in the United States and or in other countries For more information visit www pasco com legal Windows is a registered trademark of Microsoft Corporation in the United States and or...

Страница 7: ...g 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 d...

Страница 8: ...Remove the Salinity Sensor Probe from the first sample Rinse the end of the probe with distilled water 9 Repeat the data collection process with the other two samples Data Analysis 1 Autoscale the gra...

Страница 9: ...Analysis The table lists typical experimental results In general ionic salts at low to moderate concentrations have a temperature dependence of 2 per degree at 25 C Acids bases and concentrated salt s...

Страница 10: ...Salinity Sensor Notes on the Experiment 10...

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