Do Now 8/21/14 Match the following descriptions with the correct terms: 3. A scientist in the lab is trying to classify a liquid substance. She first tries evaporating it and filtering the substance but cannot find any physical means to separate into its components. She then tries a chemical change and finds that the substance can be separated by electrolysis. How could you classify this substance? (In your answer, include evidence from the question to support your conclusion.) 1.Mixture 2.Pure substance Cannot be separated by physical changes Can be separated by physical changes

Today’s Game Plan Do Now5 minutes States of Matter15 minutes Horse Races10 minutes Separation of Mixtures Lab Intro 8 minutes Design Procedures20 minutes Review20 minutes Closing, Exit Ticket7 minutes

The States of Matter – What do we already know?

The States of Matter  The three states of matter are: solid, liquid, and gas.  These three states of matter differ in terms of compressibility, structure, shape, and volume

Kinetic Molecular Theory of Matter:  Based on the idea that particles of matter are always in motion.  Theory has several basic assumptions (but we are only going to cover the first 2 today)

Assumption #1  Matter is composed of small particles (molecules)

Assumption #2  The molecules are in constant motion. This motion is different for the three states of matter.

Solid  Compressibility: Not compressible  Structure: Particles are packed together in fixed position

Solid  Shape: Definite shape  Volume: Definite volume

Liquid  Compressibility: more compressible than a solid, but barely compressible  Structure: Individual molecules do not stick together

Liquid  Shape: Indefinite Shape (takes the shape of its container)  Volume: Definite Volume

GAS  Compressibility: Highly compressible  Structure: Gas particles do not stick together

GAS  Shape: Indefinite Shape (takes the shape of its container)  Volume: Indefinite Volume; gases expand to fill whatever volume is available

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Phase Changes  Solidification (Freezing): liquid to solid  Melting: solid to liquid  Evaporation: liquid to gas  Condensation: gas to liquid  Deposition: gas to solid  Sublimation: solid to gas

Today’s Game Plan Do Now5 minutes States of Matter15 minutes Horse Races10 minutes Separation of Mixtures Lab Intro 8 minutes Design Procedures20 minutes Review20 minutes Closing, Exit Ticket7 minutes

Guided Practice Horse Races! Take out a dry erase marker and whiteboard

1 chip bet = 2 chip payout

Draw a circle on your whiteboard. Label the circle ‘Solid’ Draw the structure of the solid’s particles in your circle Solid

Answer:

This state of matter has neither a definite shape nor a definite volume. On your whiteboard write down the name of this state.

Answer: Gas

1 chip bet = 2 chip payout

Which two states of matter have a definite volume?

Answer: Solid and Liquid

Draw a circle on your whiteboard. Label the circle ‘Liquid’ Draw the structure of liquid’s particles in your circle Liquid

Answer:

Which phase change(s) decrease the movement of particles?

Answer: Deposition, solidification, condensation

In which states of matter do the particles have movement?

Answer: Solid, Liquid, and Gas

Add Up Your Points: Who is the Horse Race Champion??

Today’s Game Plan Do Now5 minutes States of Matter15 minutes Horse Races10 minutes Separation of Mixtures Lab Intro 8 minutes Design Procedures20 minutes Review20 minutes Closing, Exit Ticket7 minutes

Lab Manuals: 101 Chemistry labs are listed as a separate course in most colleges College lab expectations: Pre-read lab manual Come prepared with a pre-lab report (includes information about the procedure, safety, and any background information you may need or have learned Know your procedure!

Separation of Mixtures Lab Keep in mind:  What is the objective of the lab?  How will your group achieve this objective?  How will you determine if you were effective in obtaining this objective?

Today’s Game Plan Do Now5 minutes States of Matter15 minutes Horse Races10 minutes Separation of Mixtures Lab Intro 8 minutes Design Procedures20 minutes Review20 minutes Closing, Exit Ticket7 minutes

Design Procedures  Work with your group members to design the procedures your group will use to achieve the lab’s objective – I must sign off before you begin the lab  Each step should include…  A descriptive verb for the action  The equipment needed  The proper amounts of materials  The duration (time)  Be specific about the type of data to be recorded  “Record observations”  Record the volume of the liquid using a 50 mL graduated cylinder  Don’t forget to include when to collect data and when to clean up!

Today’s Game Plan Do Now5 minutes States of Matter15 minutes Horse Races10 minutes Separation of Mixtures Lab Intro 8 minutes Design Procedures20 minutes Review20 minutes Closing, Exit Ticket7 minutes

Today’s Game Plan Do Now5 minutes States of Matter15 minutes Horse Races10 minutes Separation of Mixtures Lab Intro 8 minutes Design Procedures20 minutes Review20 minutes Closing, Exit Ticket7 minutes

Trash Talkin’ RAFT Homework  Role  A state of matter (solid, liquid, gas)  Audience  A different state of matter (solid, liquid, gas)  Format  Trash Talkin’ Letter  Topic  Properties of state of matter (why is your state great and the other not??)

My Example:  Oh hey solid, I heard you have a bone to pick with me. I heard you said I smell like gas. I AM GAS and that smell must be your upper lip! If you think you can keep up with me you’re dead wrong. While you have to stay put because you have a definite shape and volume, I roam freely and fill whatever space and volume I can. You are so stubborn solid. When people try to press you down, you don’t let them. You are incompressible! I go with the flow and am highly compressible. Finally, I hope you enjoy having all your particles packed together the way you do. My particles are free to stretch out. Just quit being so uptight!

Homework States of Matter RAFT Lab Procedures (if not completed in class)