Vernier Software and Technology
Vernier Software & Technology

Separation and Qualitative Analysis of Cations

Introduction

When a chemist conducts a qualitative analysis, the primary goal is to identify the substances that are present in a mixture. It is important to separate substances from each other in a mixture, so that a confirming test can be as definitive as possible. After a thorough qualitative analysis investigation, it would be nice to say, for example, that potassium is present instead of saying merely that an alkali metal is present.

Conducting a qualitative analysis, or “qual scheme” as it is sometimes nicknamed, is a methodical process that requires great care. A qual scheme can be used to identify a wide variety of substances; in this experiment, you will focus on ions. It is fascinating to seek and identify a substance based on an established pattern of chemical behavior. You will see some very interesting things during this experiment, things that will help you understand more about the nature of cations and anions.

Consider this experiment to be more of a research project than a simple series of tests. In this experiment, you will place almost all of your emphasis on conceptual and theoretical information about the chemical behavior of ions. Other than careful measuring, there is no data to gather, graph, or examine in a qual scheme.

Objectives

In this experiment, you will

  • Prepare and analyze a solution that contains ten selected cations.
  • Analyze an unknown solution that contains a selection of cations.

Sensors and Equipment

This experiment 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 Advanced Chemistry with Vernier »

Experiment 14A from Advanced Chemistry with Vernier Lab Book

<i>Advanced Chemistry with Vernier</i> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

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