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The part that water plays in acidity

Description

This experiment explores the part played by water in the properties of acids.

Credits

:
This resource has been provided by, or developed in partnership with, Nuffield Foundation
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Apparatus Chemicals

Eye protection

Each demonstration or working group requires:

Oven-dried beakers (100 cm3), 2

Teat pipettes (well dried), 2

6 V DC power pack (Note 1)

Connecting wires

Switch

6 V lamp

Steel electrodes, 2 (four pairs should serve up to a total of 16 working groups)

Paper tissues/towels

Universal indicator paper, dried, kept in dessicator or distributed in dry stoppered sample tubes (Note 2)

Forceps

Oven-dried test-tubes (100 x 16 mm), 9 and stoppers to fit, 3

Oven-dried test tubes (150 x 25 mm), 3 and stoppers to fit, 3

Conical flask (100 cm3) to collect solution and stopper to fit

For making hydrogen chloride in methylbenzene:

Conical flask (500 cm3) 2

Beaker (500 cm3)

Dropping funnel (ideally a pressure equalising - Quickfit) (250cm3)

Filter funnel, (Quickfit) (1 dm3)

Drechsler bottle (or other glass container)

Rubber tubing

Stoppers or cork (for conical flask) 2

Marble chips (calcium carbonate), 2

Magnesium ribbon, cut into 1 cm lengths, 2

Dilute hydrochloric acid, 1 M, in a bottle labelled ‘Solution of hydrogen chloride in water’, 100cm3

Purified water

Methylbenzene (toluene) (HIGHLY FLAMMABLE, HARMFUL), 300cm3

Anhydrous calcium chloride 10-20 g

Concentrated sulfuric acid, CORROSIVE), 125cm3

Sodium chloride (or rock salt) 50 g

Refer to Health & Safety and Technical notes section below for additional information.

 






This experiment explores the part played by water in the properties of acids.

ADDITIONAL INFORMATION

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology.