1. Activity 3 Follow-up

2. Analysis Questions 1.Based on your observations, how many substances do you think there are in the unidentified mixture? Explain. Answer should include number of liquids (top layer and bottom layer) and solids (black squares, red squares, red tubes, dark grey and light grey rods). There should be evidence that identifies items based on color, consistency, or texture.

3. 3. What safety precautions would you take when separating the mixture? Must include: Must include: the use of goggles and gloves the use of goggles and gloves the use of tools to reduce contact with the substance, such as droppers and plastic forceps the use of tools to reduce contact with the substance, such as droppers and plastic forceps Assume substances are toxic, corrosive, or flammable Assume substances are toxic, corrosive, or flammable

4. 5.You are walking down the sidewalk and see a puddle of green, oily liquid on the ground. Can you identify the contents of the puddle through observation alone? No No Observations can give us information about …….. Observations can give us information about …….. Many things resemble each other such as… Many things resemble each other such as… An educated guess can be made An educated guess can be made

5. Activity 5 Title: Separating the Mixture

6. Read pg. A-19 Problem: How can the substances in the mixture be separated? What are the liquids in the mixture? Hypothesis/Initial Thoughts:

7. Procedure: Follow group or class procedure from Activity 3. Follow group or class procedure from Activity 3. DO NOT THROW ANYTHING AWAY!!! DO NOT THROW ANYTHING AWAY!!! When you are finished, you should have When you are finished, you should have One cup of solids One cup of solids Two cups of liquids Two cups of liquids

8. Chemical Data Safety Sheet Data/Observation: You will use this sheet for the next 2 weeks You will use this sheet for the next 2 weeks DO NOT fill in everything today! DO NOT fill in everything today! Today, describe the appearance and state of matter (solid, liquid, or gas) of the material. Today, describe the appearance and state of matter (solid, liquid, or gas) of the material. When you think you have it separated, ask me to o.k. your group before you begin clean up When you think you have it separated, ask me to o.k. your group before you begin clean up

9. Analysis: Do analysis questions 2. Make sure answers are complete and detailed using information you may have learned from this activity and from previous activities.

10. Clean Up 1. Recreate the unknown mixture 2. Wash & dry gloves and put them back in the cabinet you got them from 3. In hot soapy water, wash the containers, forceps and droppers 4. Put everything (clean and dry) back in your red bin 5. Make sure the counter top in also oil free and dry