1. Pure water has a density of 1.0 g/cm3 at standard temperature and pressure. Ethanol has a density of 0.79 g/cm3. Relative to this, substances that are less dense, will float

2. KEY VOCABULARY Conductivity A measure of the tendency of an object to support the flow of heat or electricity Density The relationship between the mass and volume of a substance. Density equals mass divided by volume (d = m/v). Evidence Observations or data to support a statement, hypothesis, or point of view. React, Reactivity Substances capable of causing an explosion or providing heat or oxygen (oxidizers) that might cause a fire, or can emit toxic fumes when mixed with other substances.

3. Copy the follow chart in your science note book TestRed TubeBlack SquareSmall Metal CylinderMedium Metal Cylinder Electrical conductivity Density relative to water Density relative to ethanol Reacts with copper chloride Sinks

4. Materials List 1 - vial labeled water “W” 1 - vial labeled ethanol “E” 1 - vial labeled copper chloride “C” 1 - pair forceps 1 - red tube 1 - black square 1 - light colored metal cylinder 1 - dark colored metal cylinder 1 - electrical conductivity tester with battery

5. TestProcedureResults Electrical conductivity1.Touch ends of the tester to opposite end of the solid being tested 2.Observe the bulb If the bulb does not light, the solid does not conduct electricity If the bulb lights, the solid conducts electricity Density relative to water1.Gently place the solid being tested into the test cup labeled water. (W) 2.Observe the solid If the solid floats, it is less dense than water If the solid sinks, it is more dense than water Density relative to ethanol1.Gently place the solid being tested into the test cup labeled ethanol (E) 2.Observe the solid If the solid floats, it is less dense than ethanol If the solid sinks, it is more dense than ethanol Reacts with copper chloride1.Gently place the solid being tested into the test cup labeled copper chloride (C) 2.Observe the solid for signs of reaction If no signs of reaction, the solid does not react with copper chloride If there any signs of reaction, the solid does react with copper chloride Indicate all your results in the chart you copied in your notebook

8. Dear Hazmat Director, I am writing to you about a recent lab activity that I did to identify solids. I want to tell you about the safety procedures that I followed so that you can be sure that I followed the correct safety procedures. In this lab I was working with four different types of solids. When I first started out with them, I didn’t know their identity, so I treated them as potentially hazardous. Because of this I wore a pair of safety goggles to prevent substances from getting into my eyes, I also………