Purpose:
• To study some of the physical properties of two types of solids – ionic and molecular solids.
• To classify three unknown substances as ionic compounds, polar covalent compounds or non-polar covalent compounds.
• To identify the three unknowns.

Observations:
A B C
Solubility in:
• H2O
• 2-Propanol
Soluble
Insoluble
Soluble
Insoluble
Insoluble
Soluble
Conductivity None High None
Melting Point 100 – 525 ℃ > 525 ℃ < 100 ℃
Odour Subtle None Very Strong

Concluding Questions:
1. Identify the type of solid in each unkown compound. Support these conclusions with observations.
Compound A is a polar covalent compound because it has many “ in between” properties, such as the following:
• The compound is soluble in water, which is usually an ionic property.
• The compound melted at a temperature between 100 and 525 degrees Celsius, which is not a definite property of ionic or non-polar covalent bonds. Hence, it is covalent.......

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Title: Identifying 3 Unkown Compounds (Physical Properties Of Ionic And Molecular Solids)
Approximate Word Count: 797
Approximate Pages: 4 (250 words per double-spaced page)

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