What is Chemistry? Chemistry is the study of the 1. composition, 2. structure, and 3. properties of matter and the changes it undergoes. Main Menu

Are these things matter? Your book, your desk, your lunch, the air that you breathe and the water you drink? How do you know? Your book, your desk, your lunch, the air that you breathe and the water you drink? How do you know?

 Matter is anything that has mass and volume. 1. Mass is the amount of matter an object has. 2. Volume is the amount of space an object takes up.

Mixtures: contain more than one type of matter and are physically combined. Homogeneous Mixture – (Solution) uniform (same) throughout in composition Examples: coffee air (mixture of gases) Alloys like: brass (Cu & Zn) steel (Fe & C)

Mixtures: contain more than one type of matter and are physically combined. Heterogeneous Mixture not uniform (different) throughout in composition Examples: sand in water tea with ice cubes oil in water chicken noodle soup

Homogeneous When you don’t see the gas bubbles. What is soda ? Heterogenous or Homogeneous? Heterogeneous When you see the gas bubbles.

Pure Substances: contain only one type of matter. Compounds – made from more than one kind of atom – A molecule is the smallest particle of a compound that retains its properties. – Compounds cannot be separated by physical means! (only by chemical reactions) Ex: salt, distilled water, sugar Elements – made of only one kind of atom. – An atom is the smallest part of an element). Ex:

Pure Substances: contain only one type of matter. Compounds – made from more than one kind of atom – A molecule is the smallest particle of a compound that retains its properties. – Compounds cannot be separated by physical means! Ex: salt, distilled water, sugar Elements – made of only one kind of atom. – An atom is the smallest part of an element). Ex:

Classify Matter Element, Compound, Homogenous mixture, or Heterogeneous mixture Boric Acid Solution Oxygen gas (O 2 ) Carbon monoxide (CO) Steel (Carbon, Iron) Casserole Homogeneous mixture Element (molecule) Compound Homogeneous mixture Heterogeneous mixture

Exit Ticket 1.Describe how you can tell if something is a mixture or a pure substance? 2.What is one new thing you learned from today’s lesson?

You have 15 minutes to solve the following mission: You are given a beaker filled with equal parts SALT, SAND, and IRON fillings. How can you separate these three items? You may use any of the following supplies: -Extra Beakers-Magnet -Ring Stand-Water -Filter Paper-Hot plate -Tweezers-Graduate Cylinder Once you have written your procedure, step by step (“First, I would _____. Then, I would _____. ETC), raise your hand to have it checked. You must receive a stamp on your warm-up to receive credit. August 21-Sept 1

Today’s Mission: Identify the 4 states of matter Describe the motion of particles in the 3 main states of matter Today’s Agenda: Methods of Separation States of Matter Exploration Virtual Lab

Separation of Mixtures Mixtures can be separated by physical means. a) Filtration b) Centrifuge c) Chromatography d) Distillation e) Crystallization Separate sand and salt?

Separation of Compounds Compounds can be separated chemical means. Examples: a) Electrolysis of water water  hydrogen gas and oxygen gas b) Chemical Reactions Magnesium + Acid  hydrogen gas Mg + HCl (acid)  MgCl 2 + H 2 So the properties of compounds may be similar or different than the properties of their elements!

Video: States of Matter Oobleck MythBusters

Create the following chart in your notes: You will fill in the boxes with a check mark if the answer is YES Phase/ State Definite Shape? Definite Volume? Is it Compressible? Solid Liquid Gas

States of Matter Phase/ State Definite Shape? Definite Volume? Is it Compressible? Solid Liquid Gas Plasma – “charged gas”.

States of Matter Phase/ State Definite Shape? Definite Volume? Is it Compressible? Solid Liquid Gas Plasma – “charged gas”.

States of Matter Phase/ State Definite Shape? Definite Volume? Is it Compressible? Solid Liquid Gas Plasma – “charged gas”.

Virtual Lab Day-- 1.You must complete the pre-lab and get it signed before your group can get a computer. 2. If this lab is not completed in class, it will need to be finished as HOMEWORK! Virtual Lab Reminders: 1.You may only use the required site: phet.colorado.edu 2.You may not listen to music/Use your cell phone >>Don’t even ask!!! 3.When you are finished, please remember to plug your computer in Failure to follow these reminders will result in loss of computer privileges, grade reduction, and an alternative assignment (to be completed individually).