Vernier Software and Technology
Vernier Software & Technology

Conductimetric Titrations

Figure from experiment 18 from Investigating Chemistry through Inquiry

Introduction

There are a number of ways to investigate a chemical reaction. Measuring temperature change, pressure change, pH change, and/or conductivity change are some of the ways. A titration is a process used to determine the volume of a solution needed to react with a given amount of another substance. You have probably done pH titrations in other experiments; now you will be performing conductivity titrations. In the Preliminary Activity, you will titrate a solution of the strong acid hydrochloric acid, HCl, with a solution of the strong base sodium hydroxide, NaOH. The concentration of the NaOH solution is given, and you will determine the unknown concentration of the HCl. Hydrogen ions from the HCl react with hydroxide ions from the NaOH in a one-to-one ratio to produce water in the overall reaction:

{{\text{H}}^{\text{ + }}}{\text{(aq)  +  C}}{{\text{l}}^ - }{\text{(aq)  +  N}}{{\text{a}}^{\text{ + }}}{\text{(aq)  +  O}}{{\text{H}}^ - }{\text{(aq)}} \to {{\text{H}}_{\text{2}}}{\text{O(l)  +  N}}{{\text{a}}^{\text{ + }}}{\text{(aq)  +  C}}{{\text{l}}^ - }{\text{(aq)}}

Objectives

You will determine the volume of NaOH titrant used at the equivalence point using the intersection of the linear fits of the two branches of the resulting curve. The volume of NaOH titrant used at the equivalence point will be used to determine the molarity of the HCl.

After completing the Preliminary Activity, you will first use reference sources to find out more about conductimetric titrations before you choose and investigate a researchable question involving conductimetric titrations.

Sensors and Equipment

This investigation features the following Vernier sensors and equipment.

Option 1

Option 2

Additional Requirements

You may also need an interface and software for data collection. What do I need for data collection?

Standards Correlations

See all standards correlations for Investigating Chemistry through Inquiry »

Investigating Chemistry through Inquiry

See other experiments from the lab book.

1Physical Properties of Water
2Baking Soda and Vinegar Investigations
3An Investigation of Urea-Containing Cold Packs
4Conductivity of Aqueous Solutions
5Identifying a Pure Substance
6Investigating the Energy Content of Foods
7Investigating the Energy Content of Fuels
8Evaporation and Intermolecular Attractions
9Enthalpy Changes
10Reaction Stoichiometry
11Beer's Law Investigations
12Colligative Properties of Solutions
13Long Term Water Monitoring
14Vapor Pressure and Heat of Vaporization Investigations
15Acid-Base Properties of Household Products
16The Effect of Acid Deposition on Aqueous Systems
17Acid-Base Titrations
18Conductimetric Titrations
19Oxidation-Reduction Titrations
20Investigating Voltaic Cells
21Baking Soda and Vinegar Investigations Revisited
22Reaction Rates
23Enzyme Activity
24Sugar Fermentation by Yeast
25Nuclear Radiation

Investigation 18 from Investigating Chemistry through Inquiry Lab Book

<i>Investigating Chemistry through Inquiry</i> book cover

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