1 / 7

Exploring Qualitative Analysis Techniques: Flame Tests and Spectroscopy

This unit covers qualitative analysis, focusing on techniques such as flame tests and spectroscopy to identify substances using their physical and chemical properties. You will learn how to differentiate between ionic and covalent properties and apply flame tests to determine the identity of metal ions based on the color they produce when heated. The example involving calcium bromide and dichlorobenzene illustrates how to utilize odor and solubility to distinguish between substances. Engage in a lab activity to practice flame tests and identify unknown solutions based on known flame colors.

pearly
Télécharger la présentation

Exploring Qualitative Analysis Techniques: Flame Tests and Spectroscopy

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Unit 1 – Day 9 Qualitative Analysis

  2. Qualitative Analysis Techniques • Qualitative analysis uses physical and chemical properties to identify substances. • We have already learned two such techniques: • Ionic and covalent properties • Spectroscopy • The rest of the unit focuses on two more techniques: • Flame tests • Solubility

  3. Recall • Two substances are mixed up. One is labelled substance A, the other substance B. • The two substances are known to be calcium bromide and dichlorobenzene (a substance made up of carbon, hydrogen and chlorine). • Substance A has a strong odour, and will not dissolve in water. • Identify substance A and B • Dichlorobenzene is substance A.

  4. Recall • Describe how you could use a spectrometer, and the following image to identify the gas in a lighting display.

  5. Flame Tests • Flame tests are similar to spectroscopy. • This time we are using heat to excite the electrons instead of electricity. • The colour of the flame helps to identify the substance.

  6. Flame Tests • With flame tests, it is the metal ion that determines the colour that the compound will produce. • For example, Strontium produces a deep red flame. • Strontium chloride flame test

  7. Flame Test Lab • In the following lab, you will need to do some flame tests. • Fill in the table of known colours, and then use these to identify the unknown solutions.

More Related