Friday

September 18, 2009

Essential Questions

How would scientists determine the identity of an unknown metal?

SC-H-STM-S-9Students will investigate the role of intermolecular or intramolecular interactions on the physical properties (solubility, density, polarity, boiling/melting points) of compounds

Homework1. Vocab List E…due Monday, Sept 21

Vocab Quiz E…

2. Density of Irregular Solids and Liquids due Today

Lab Assessment

Identification of an unknown metal using density.

Purpose: identify the following metal shot using density

Procedure: use the lab techniques that you learned this week to find the density of the metal shot and compare that density to a set of known densities.

Be sure to record the procedure that you used.

Hypothesis: predict what you think the metal shot is made of

Sample Densities of various Metals

Metal Density (g/cm3)Aluminum 2.70Bismuth 9.78Chromium 7.19Copper 8.94Iron 7.87Lead 11.34Silver 10.49Steel 8.05Titanium 4.51

Assessment (due on Tuesday)

Students will submit a written laboratory report in order to support or reject their stated hypothesis as to the identity of the metal shot.