Chemlab: Chemistry 3/5


Qualitative Analysis of Cations

Overview

Getting Started

Techniques

Procedure

FAQ

Full Lab Manual

Introduction & Goals

Chemistry & Background

Key Questions

Prelab Problems

Safety

Procedure

In Your Write-up

Experiments Index

ChemLab Home

Applets

Qualitative Analysis of Cations Applet
With this applet you can use laboratory reagents to test known and unknown samples on the web-based lab bench. Practice before lab to make your unknown analysis in the lab more accurate and efficient!

Periodic Table Applet
You can use the periodic table applet to look up information about an element, to learn about periodic trends, or as a molar mass calculator. It may be helpful writing and balancing equations this week.
Technique Links

Centrifugation
Goals
In this experiment, you will use qualitative analysis to identify the cations in known and unknown samples. By observing the reactions of known cation samples, you will construct a logical flow chart for identifying the components of a mixture of unknown cations. This experiment also illustrates a practical application for the theory of solubility equilibria, a topic covered later on in Chem 3 and 5.

Key Questions
1. What ions are present in my test tube?

2. What ions are in solution?

3. What is the precipitate?

4. What do I expect to happen as I add the next reagent?
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