Expt :
Name: Elizabeth Bonner
Date
Grade 12
: January 31,2023
Topic : Structural Bonding
Aim
: To classify compounds as ionic or covalent based on their physical properties.
Apparatus & Materials: compounds labelled A, B, C and D, test tubes, test tube rack, test tube
holder, glass rod, 250cm3 beaker, spatula, Bunsen burner, electrical circuit, propanone, distilled
water
Procedure:
1. A small amount of sample A was placed in a test tube and heated gently then more
strongly until there was no further change. The observations were recorded.
2. A small amount of sample A was added to 20cm3 of distilled water. The results were
recorded, dissolved or not. The meixtyre was then tested with an electrical circuit to
findout if it conducted electricity.
3. Step two was repeated with propane instead of distilled water.
4. Steps 1 to 3 were repeated with the other samples B, C and D.
Table of results showing tests carried out on samples A,B,C and D:
Samples
Effect of heat
A
B
Did not melt
C
D
Melted
Sublimed
Dissolved
Did not dissolve
Did not dissolve
Bulb lit
Did not light
Did not light
Did not melt
Solubility in water
Dissolved
Electrical
water
conductivity
in
Did not light the
bulb
Solubility in propanone
Did not dissolve
Electrical
propanone
conductivity
in Did not light
Did
dissolve
Did not light
not Did not dissolve
Did not light
Dissolved
Did not light