Determining Bond Type of Unknown Substances

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Determining Bond Type of Unknown Substances

(Molecular or Ionic)

Purpose:

The purpose of this lab was to determine the type of bonding in some unknown substances based on their physical properties.

Table of Properties:

Properties

Ionic

Molecular

Electrical Conductivity of the compound in aqueous solution

Conduct

Don't Conduct

Melting and Boiling points

High

Low

Electrical Conductivity of the compound in liquid form

Conduct

Don't Conduct

Hardness

Hard

Soft

Polar solvents

Can dissolve ionic compounds that ionize.

Can dissolve covalent compounds that ionize.

Procedure:

* Test one: Hardness

* Test two: Dissolve in water and see if it conducts electricity

* Test three: Heat up to see how fast it will melt or boil

1) Carefully read the directions first

2) Gather Materials

- Test tubes, several unknown compounds, conductivity testers, oil, wooden stirring sticks, water, Bunsen burner, test tube racks, goggles.

3) Put on Safety Equipment (goggles)

4) Perform Test One by pressing compounds to see how hard/soft it is

5) List Observations

6) Perform