Experiment 17 Qualitative Analysis of Household Chemicals


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Background

 

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Even if you are not a chemist by either profession or by major, you do work with chemicals everyday of your life.  In a common household there are hundreds of chemicals that clean our houses, clean our hair and bodies, cook our food or even cure our aches and pains.  All of these substances are chemicals and the actions they perform are dependent on their chemical natures.
            Listed below are some of the more common household chemicals, listed by both their common names as well as their use around the house.  In today’s lab, we will be examining some of the physical and chemical properties of these substances in order to match the common name to the chemical name and better understand how they work in the everyday world.

Common Name

Common Usage

Chemical Nature

Baking Soda

Baking

pH 8.3, Slightly Water Soluble

Boric Acid

Antiseptic Wash

pH 5.1, Water Soluble

Chalk

Writing Chalk

Non-Water Soluble

Epsom Salts

Laxative

pH 6-7, Water Soluble

Fruit Sugar

Cooking Sweetener

pH Unknown Water Soluble

Lye

Drain Cleaner

pH 13-14 Water Soluble

Washing Soda

Cloth Cleaning Agent

pH 11.6, Water Soluble

The chemical names or formulas for the common household chemicals above are contained in this list (in no particular order): NaHCO3, MgSO4, H3BO3, Fructose, NaOH, CaCO3, Na2CO3.  Your job today is to match up the chemical name with the common name based on the description of the chemical nature of that household chemical given above.  You will be given each of the chemicals above in reagent bottles marked with their real chemical name and formula.  You will then perform several analytical tests to determine which chemical is which.  The tests you will be able to run are solubility, pH and a test to determine the presence of a sugar.

 

 

 


Overview | Module | Background | Procedure | Report