Activity 3Activity 3

Follow-up Follow-up

Analysis QuestionsAnalysis Questions

1.1. Based on your observations, how many Based on your observations, how many substances do you think there are in substances do you think there are in the unidentified mixture? Explain.the unidentified mixture? Explain.

Answer should include number of Answer should include number of liquids (top layer and bottom layer) liquids (top layer and bottom layer) and solids (black squares, red squares, and solids (black squares, red squares, red tubes, dark grey and light grey red tubes, dark grey and light grey rods). There should be evidence that rods). There should be evidence that identifies items based on color, identifies items based on color, consistency, or texture.consistency, or texture.

3.3. What safety precautions would you What safety precautions would you take when separating the mixture?take when separating the mixture?

► Must include: Must include: ► the use of goggles and glovesthe use of goggles and gloves► the use of tools to reduce contact the use of tools to reduce contact

with the substance, such as with the substance, such as droppers and plastic forcepsdroppers and plastic forceps

► Assume substances are toxic, Assume substances are toxic, corrosive, or flammablecorrosive, or flammable

5.5. You are walking down the sidewalk and You are walking down the sidewalk and see a puddle of green, oily liquid on the see a puddle of green, oily liquid on the ground. Can you identify the contents of ground. Can you identify the contents of the puddle through observation alone?the puddle through observation alone?

NoNo Observations can give us information Observations can give us information

about ……..about …….. Many things resemble each other such Many things resemble each other such

as…as… An educated guess can be madeAn educated guess can be made

Activity 5Activity 5

TitleTitle: :

Separating the MixtureSeparating the Mixture

Read pg. A-19Read pg. A-19

Problem:Problem: How can the How can the substances in the mixture be substances in the mixture be separated? What are the separated? What are the liquids in the mixture?liquids in the mixture?

Hypothesis/Initial Thoughts:Hypothesis/Initial Thoughts:

Procedure:Procedure:

►Follow group or class procedure from Follow group or class procedure from Activity 3.Activity 3.

►DO NOT THROW ANYTHING AWAY!!!DO NOT THROW ANYTHING AWAY!!!►When you are finished, you should When you are finished, you should

havehave One cup of solidsOne cup of solids Two cups of liquidsTwo cups of liquids

Chemical Data Safety SheetChemical Data Safety Sheet

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

Analysis:Analysis:Do analysis questions 2. Make sure Do analysis questions 2. Make sure

answers are complete and detailed answers are complete and detailed using information you may have using information you may have learned from this activity and from learned from this activity and from previous activities.previous activities.

Clean UpClean Up1.1. Recreate the unknown mixtureRecreate the unknown mixture

2.2. Wash & dry gloves and put them back Wash & dry gloves and put them back in the cabinet you got them fromin the cabinet you got them from

3.3. In hot soapy water, wash the In hot soapy water, wash the containers, forceps and dropperscontainers, forceps and droppers

4.4. Put everything (clean and dry) back in Put everything (clean and dry) back in your red binyour red bin

5.5. Make sure the counter top in also oil Make sure the counter top in also oil free and dryfree and dry