Skip to main content

The properties of hydrogen chloride

Description

In this experiment you will observe the properties of hydrogen chloride. The fountain demonstration using universal indicator is especially good for showing its great solubility in water.

Type of Activity

:
demonstration, class practical

Audience

:
Teacher

Age Group

:
11 to 18 years

Credits

:
This is an experiment from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry.
the-properties-of-hydroge...



Apparatus Chemicals

Eye protection (including goggles for generating and handling hydrogen chloride gas)

For the fountain demonstration (see diagram below), the teacher requires:

Access to a fume cupboard

Safety screens

Large round-bottomed flask (500–1000 cm3) (Note 1)

Bung to fit flask, with holes for a teat pipette (with detachable teat) and delivery tube as shown (Note 2)

Valve, consisting of a short length of rubber tubing and a Mohr’s clip

Glass trough or plastic bowl

Short lengths of rubber tubing

Clamp stands, bosses and clamps (Note 3)

Small glass funnel – to fit inside a 250 cm3 beaker

Beaker (250 cm3)

Conductivity testing apparatus (3 V DC supply, graphite electrodes in bung, leads and clips, torch bulb in holder)

For testing the properties of pre-prepared dilute hydrochloric acid, each group of students requires:

Test-tubes, 4

Test-tube rack

Plastic dropper pipettes

Wooden splints

Concentrated sulfuric acid (CORROSIVE), 10 cm3

Sodium chloride, 30 g (Note 4)

Universal indicator solution

Access to:

Dilute hydrochloric acid, 0.1 M

Sodium hydroxide solution, 0.1 M (IRRITANT)

Limewater (IRRITANT), fresh, a few cm3

Universal indicator solution (HIGHLY FLAMMABLE)

Universal indicator papers

Magnesium ribbon, 2 cm lengths

Small marble chips, a few

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

 








In this experiment you will observe the properties of hydrogen chloride. The fountain demonstration using universal indicator is especially good for showing its great solubility in water.

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.