Solutions: Strength of Electrolytes
Test various concentrations of electrolytic solutions in order to determine the relationships among degree of dissociation, solute concentration, and electrolytic strength.
Lab Summary
In this exploration, students will use a conductivity sensor and voltage/current sensor to test various concentrations of electrolytic solutions in order to determine the relationships among degree of dissociation, solute concentration, and electrolytic strength.
Downloads
- Download Free Lab (PDF, 424 KB) (420 KB, .pdf)
(student version)
Method
Use the Conductivity Sensor and the Voltage/Current Sensor to test electrolyte solutions of various concentrations and determine the relationships among degree of dissociation, solute concentration, and electrolytic strength.
Here's What You Need
U.S. Educator prices shown.
Probeware
PASPORT Conductivity Sensor (PS-2116A) - $110
Utilizes platinum probes for greater range and improved accuracy in high & low concentrations.
PASPORT Voltage-Current Sensor (PS-2115) - $99
Allows students to safely measure voltage and current simultaneously without overloading the sensor. For use with PASPORT Interfaces.
Xplorer GLX (PS-2002) - $349
The Xplorer GLX is a data collection, graphing, and analysis tool designed for science students and educators.
Other Products
Small Tripod Base and Rod (SE-9451) - $24
The steel rod is 9.5 mm (3/8 in.) in diameter and 50 cm long.
Buret Clamp (SE-9446) - $12
The V-shaped, plastic-coated jaws will gently hold a buret and lock at any angle.
Other Materials
- Zinc wire/strip
- Copper wire
- Beaker, 150 mL
- 1.0 M hydrochloric acid, HCl
- 0.1 M hydrochloric acid, HCl
- Glacial acetic acid, CH3CO2H
- 0.1 M acetic acid, CH3CO2H
- 0.01 M calcium hydroxide, Ca(OH)2
- 0.1 M ammonia, NH3
- 0.1 M copper(II) sulfate, CuSO4
- 0.1 M ammonium chloride, NH4Cl
- Water
- Water, distilled
- Wash bottle and waste container
- Cardboard or foam board
