Featured in PASCO’s Chemistry through Inquiry Teacher Guide

Chemistry through Inquiry Teacher Guide

(PS-2871C)

Features over 25 inquiry based labs covering the fundamental concepts of lab skills, structure & properties of matter, chemical reactions and more.

Electrolyte v Non-Electrolyte

Lab Summary

Use a conductivity sensor to determine which substances in sports drinks (water, sugars, or salts) are electrolytes.

Theory

In this activity, students determine which substances in sports drinks (water, sugars, or salts) are electrolytes. Through this investigation, students

  • Differentiate an electrolyte solution from a non-electrolyte solution.
  • Describe the effect concentration has on the conductivity of an electrolyte solution.
  • Determine the approximate concentration of electrolytes in a sports drink.

Method

Students conduct the following procedures:

  • Measure the conductivity of salt solutions, sugar solutions, and a sample of a sports drink.
  • Graph conductivity versus concentration.
  • Use the graph to determine the concentration of electrolytes in a sports drink.

Sensors / Equipment Used:

PASPORT Conductivity Sensor

(PS-2116A)

Utilizes platinum probes for greater range and improved accuracy in high & low concentrations.

Materials Used:

Test tube, 20-mm × 150-mm - 6
Beaker for collecting rinse water 
Test tube rack 
Funnel 
Wash bottle filled with distilled (deionized) water
Sucrose solutions (0.02 M, 0.04 M, 0.06 M, 0.08 M, 0.10 M) - 25 mL of each
Sodium chloride solutions (0.02 M, 0.04 M, 0.06 M, 0.08 M, 0.10 M) - 25 mL of each
Distilled (deionized) water - 50 mL
Sports drink - 25 mL

The Associated Bundle:

Chemistry Standard Sensor Bundle

(PS-2927C)

Contains the sensors and probes needed to perform all 17 experiments in the Advanced Chemistry Teacher Guide and all 25 labs in the Chemistry through Inquiry Guide.

Interface Required

This experiment may require software and an interface for data collection.