Bell Ringer  Staple the following together in this order: 1. Classifying Matter Lab 2. Lab Equipment & Safety Lab 3. Chem Rockets Lab  Identify the following as either an element, compound, homogeneous or heterogeneous mixtures: Sugar waterDr. Pepper, carbonated HCl (g)Trail mix CarbonCopper (II) sulfate Turn class materials (i.e. soap, wipes, toothpicks) into the demo lab station WITH YOUR NAME ON THEM

Fume Hood

Quiz Time – 15 minutes  I will collect cell phones in the shoe box.  You only need a pen or pencil to complete this quiz.  Good luck

Physical and Chemical Properties & Changes

Create the following table in your notes PhysicalChemical Properties Examples Change Examples -- Extrinsic Property: Intrinsic Property: Evidences of a chemical change:

Physical Properties (two types)  Definition: characteristics that a sample of matter exhibit without any changes in its identity.  Examples: solubility, melting point, boiling point, color, density, conductivity, physical state (gas, liquid, or solid), viscosity

Extensive properties (extrinsic) :  definition: measurable physical property that depends on the amount of matter present  examples: mass, volume, length  not very useful in identifying unknown substances Intensive properties (intrinsic):  definition: measurable physical property that does not depend on the amount of matter present  examples: density, boiling point, conductivity  can be very useful in identifying unknown substances

Physical change  The change in the form or state of a substance  i.e., from solid to liquid or liquid to gas or solid to gas, without changing the chemical composition of the substance  Examples: all changes of state (evaporation, condensation, melting, boiling, sublimation, deposition).

States of Matter

Water Cycle

Physical Changes  Physical Changes also include changes in size, shape, or dissolving.  Examples: tearing, breaking, smashing, building, dissolving (making a solution): salt water, kool-aid

Chemical Properties  Definition: a property that can be observed only during a chemical change  Examples:  reaction to acid,  reaction to heat (explode),  reaction to water,  reaction to oxygen (ability to rust),  flammability

Chemical change  The change of a substance into another substance, by reorganization of the atoms, by the making and breaking of chemical bonds.  Recognizing a chemical change: 1. formation of a precipitate 2. change in color (unpredicted) 3. change in smell 4. change in energy (temperature) 5. effervescence

Chemical Changes  Examples of chemical changes: burning, rusting, decaying, digestion

Rock Cycle

Five indicators of chemical change  1. Precipitate – a solid is formed when two liquids are mixed together.  The indicator that a precipitate has formed is that the liquid turns cloudy.

Five indicators of a chemical change  2. Color change (unexpected)  Unexpected color change – chemical  Expected color change – physical  3. Odor  Good or bad smell

Five indicators of a chemical change  4. Energy Change – heat, light, or sound is produced  Exothermic – gives off heat, feels hot  Exergonic – loses energy = spontaneous reaction  Endothermic – takes in heat, feels cool.  Endergonic – requires energy

Five indicators of a chemical change  5. Effervesce  Production of a gas (you see bubbles or fizzing)

Lab Write Up Pre-lab DUE Tuesday, 9/2

Class Website papchemistry.weebly.com

Kahoot, if time

Exit Ticket (turn in at door)  Please get forms turned in if you have not already. I do look at these!  On a piece of paper, reflect on your first week of school. What have you liked? Not liked? What are you looking forward to next week?  Remember to pick up your cell phone on the way out! Comprehensive quiz next Wed. (9/3) MSDS Project due Wed. (9/3) element name example = Bilbrium