monday 10/07/13 1.how can a substance be indentified? by physical and chemical properties

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Monday 10/07/13 1.How can a substance be indentified? By physical and chemical properties

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1. Wood block2. White tile3. Styrofoam 4. Marble5. Rock

Wed 10/23

11.A bar of soap is 12 cm tall, 6 cm wide, and 10 cm long. It has a mass of 415 grams. What is the density of the bar of soap. (round to 2 places behind the decimal point)

D=M/V12cmx6cmx10cm=720 cm3

D=415g / 720cm3

D=0.58 g/cm3

Density

Periodic table

Minerals

Energy

Energy Transformations

Heat transfer

Movement of heat

Chemical change

D = M/V

D = _____ g/cm3 (solids)D = _____ g/ml (liquids)

Grams/ balance - scaleVolume/ LxWxH - rulerVolume/ displacement (graduated cylinder)

Minerals

Solid NaturalInorganicCrystal structureChemical formula

How to indentify:Hardness- mohs scale 1-10Color – sometimesStreak – color of powderLuster – metallic or non metallicDensity and fracture

Conductor - electricityMalleable – hammer into sheetsDuctile – bend, without breakingLuster – shiny, dullSemi-conductor - metalloids

Jolene wants to experiment with sugar cubes. Which of the following causes a sugar cube to only change physically, not chemically?

a) burning the sugar cube with a matchb) crushing the sugar cube and dissolving it in waterc) dehydrating the sugar cube with sulfuric acidd) chewing the sugar cube and digesting it

1. Finish Phy and chm change cut and paste 2. Work on BM review

Common ElementsWhat common elements are in each? Draw something , and circle the elements that will help you remember.

1. Atmosphere 2. Living matter

3. Earth’s crust 4. Oceans

Oceans

1. ____________ glass breaking ____________ mixing salt and water2. ____________ hammering wood together 11. ____________ mixing oil and water3. ____________ a rusting bicycle 12. ____________ water evaporating4. ____________ melting butter 13. ____________ cutting grass5. ___________ separate sand from gravel 14. ____________ burning leaves6. ____________ bleaching your hair 15. ____________ fireworks exploding7. ____________ frying an egg 16. ____________ cutting your hair8. ____________ squeeze oranges for juice 17. ____________ crushing a can9. ____________ melting ice 18. ____________ boiling water

If I mix two liquids together and it changes color, then it is a physical change.

Common ElementsWhat common elements are in each? Draw something , and circle the elements that will help you remember

1. Atmosphere

NOCO2

2. Living matter

OCH

3. Earth’s crustOSiFe

4. Oceans HONaCl

Title Physical vs. Chemical

1. Physical properties p. 262. Physical change p. 303. Chemical properties p. 264. Chemical change p. 31

4. Chemical Change - occurs when a substance combines with another to form a new substance Ex: Match burning

• Go to strack pagequick linkstextbookusername - strackPassword - stracktxClick on www.pearsonsuccessnet.com science not active use lang artsUsername - k then 6 digit iD#Password - Books6

• A. Physical properties - A quality or condition of a substance that can be observed or measured without changing the substance's condition. some examples:

• state at room temperature • melting point • freezing point • color • density /specific gravity • solubility • conductivity • magnetic

• 2. All substances have definite properties,• A. Physical properties / physical change - "things it can do alone" definition - A quality or condition of a substance that can be observed or measured without changing the

substance's condition. some examples:• state at room temperature • melting point • freezing point • color • density /specific gravity • specific heat • polarity • solubility • conductivity • magnetic • malleability • Substances that are combined without reacting are called mixtures, to learn more about mixtures.• Substances that react to one another and chemically bond are called elements or compounds.• B. Chemical properties / chemical change - "it takes two to tango"• definition - How a substance reacts to other substances. When one or more substances react they become a third, unique, substance often with new physical and chemical

properties. some examples:• oxidation - rusting or burning • flammability • in a chemical reaction there are reactants and products, these occur in definate proportions. • chemical reactions are predictable and repeatable• there are also definate clues that a reaction has taken place including:• change in physical properties • color change • gas given off • temperature change • Law of conservation of matter / mass • Matter can never be created nor destroyed. All matter that is present before a chemical reaction occurs is also present after the reaction, although it may be in a new compound.