Essential Questions What is the definition of matter? Differentiate between physical and chemical...

Essential QuestionsEssential Questions

What is the definition of matter?What is the definition of matter? Differentiate between physical and Differentiate between physical and

chemical properties.chemical properties. Illustrate the states of matterIllustrate the states of matter Know the changes of states of matterKnow the changes of states of matter What are the signs that tell you that What are the signs that tell you that

a chemical reaction might be taking a chemical reaction might be taking place?place?

Classification of Classification of MatterMatter

Matter? Matter?

Does it Matter? Does it Matter?

What’s the Matter? What’s the Matter?

So, What is Matter ?So, What is Matter ?

Matter is defined as anything that Matter is defined as anything that has :has :

Mass (inertia Mass (inertia a resistance to change in movement)a resistance to change in movement)

Takes up space (volume)Takes up space (volume)

Physical PropertyPhysical Property

Any quality or condition of a Any quality or condition of a substance that can be observed or substance that can be observed or measured measured without changing the without changing the substances identity.substances identity.Examples: color, solubility, odor, Examples: color, solubility, odor,

hardness, melting point, and statehardness, melting point, and state

Physical States of MatterPhysical States of MatterThere’s 4 of them !There’s 4 of them !

SOLIDS SOLIDS Have definite (or fixed) shape and volumeHave definite (or fixed) shape and volume

The particles in a solid are The particles in a solid are held fairly rigidly in held fairly rigidly in place.place.

Physical States of MatterPhysical States of MatterThere’s 4 of them !There’s 4 of them !

LIQUIDS LIQUIDS Have a definite volume but no fixed shape.Have a definite volume but no fixed shape.

The particles in a liquid are The particles in a liquid are free to flow around free to flow around each othereach other

Physical States of MatterPhysical States of MatterThere’s 4 of them !There’s 4 of them !

GASES GASES Have neither definite or fixed shape or volume.Have neither definite or fixed shape or volume.

The particles in a gas are: The particles in a gas are: widely disbursed,widely disbursed,

interact weakly,interact weakly,

move independently at high move independently at high speed,speed,

and completely fill any container they and completely fill any container they occupy.occupy.

44thth Type of Matter Type of Matter

PLASMAPLASMA Gases whose particles are so hot Gases whose particles are so hot

they have acquired an electrical they have acquired an electrical charge.charge.

Changes of StateChanges of State

Physical Changes in MatterPhysical Changes in Matter

change in a change in a substance that substance that doesn’t doesn’t changechange the the identity of the identity of the substancesubstance

Ex. grinding, Ex. grinding, cutting, melting, cutting, melting, boilingboiling

Includes all changes Includes all changes of stateof state (physical (physical changes of a changes of a substance from one substance from one state to another)state to another)

Chemical Changes in MatterChemical Changes in Matter

a change in which a substance a change in which a substance is is converted into a different substanceconverted into a different substance

same as chemical reactionsame as chemical reaction doesn’t changedoesn’t change the amount of matter the amount of matter

presentpresent reactantsreactants – substances that react – substances that react productsproducts – substances that form – substances that form

Signs of Chemical ChangeSigns of Chemical Change

Energy is always absorbed or given Energy is always absorbed or given offoff

Change in color or odorChange in color or odor Production of a gasProduction of a gas IrreversibilityIrreversibility

Chemical or Physical?Chemical or Physical?

Cookies are bakedCookies are baked Water boilsWater boils Salt dissolves in waterSalt dissolves in water Milk spoilsMilk spoils A metal chair rustsA metal chair rusts Paper is tornPaper is torn A tree burns downA tree burns down

Law of Conservation of MassLaw of Conservation of Mass

In any physical change or chemical In any physical change or chemical reaction, reaction, mass is neither created mass is neither created nor destroyed; it is conserved.nor destroyed; it is conserved.

Law of Conservation of Mass

Total mass of substances before reaction

= Total mass of substance after reaction

From the law of conservation of mass:

Can you find the amount of oxygen that reacts?

Mercury + oxygen red-orange residue

2.53g 2.73g

EQ’s EQ’s How is matter classified?How is matter classified? What are pure substances?What are pure substances? What are mixtures?What are mixtures? What are homogeneous mixtures?What are homogeneous mixtures? What are heterogeneous mixtures?What are heterogeneous mixtures?

A. Matter FlowchartA. Matter Flowchart

MATTER

Can it be physically separated?

Homogeneous Mixture

(solution)

Heterogeneous Mixture Compound Element

MIXTURE PURE SUBSTANCE

yes no

Can it be chemically decomposed?

noyesIs the composition uniform?

noyes

Colloids Suspensions

Pure SubstancesPure Substances every sample has every sample has

samesame:: characteristic propertiescharacteristic properties compositioncomposition

are made of: are made of: one type of atom: one type of atom:

elementelement• Ex: iron, gold, oxygenEx: iron, gold, oxygen

2 or more types of 2 or more types of atoms: atoms: compoundcompound• Ex: salt, sugar, waterEx: salt, sugar, water

Which are pure substances?Which are pure substances?

MixturesMixtures blend of blend of 2 or more types2 or more types of matter of matter each component each component keeps its own keeps its own

identity and propertiesidentity and properties the components are the components are only physically only physically

mixedmixed can be can be separated using physical separated using physical

meansmeans properties of the mixture are a properties of the mixture are a

combination of the combination of the componenent’s propertiescomponenent’s properties

Homogeneous MixturesHomogeneous Mixtures

also called also called solutionsolution

uniform in uniform in compositioncomposition

no visible partsno visible parts

Ex: Ex: vinegarvinegar clear airclear air salt watersalt water brassbrass

MixturesMixtures

Heterogeneous MixturesHeterogeneous Mixtures

not uniform in not uniform in compositioncomposition

visible partsvisible parts

Ex: Ex: soilsoil concreteconcrete bloodblood chocolate chip chocolate chip

cookiescookies sand in watersand in water iced tea with ice iced tea with ice

Substance or Mixture?Substance or Mixture? A homogeneous mixture A homogeneous mixture

lookslooks like a substance like a substance Is the material in question Is the material in question

always a single kind of always a single kind of material? For instance, there material? For instance, there are different grades of are different grades of gasoline and different kinds gasoline and different kinds of cough syrupof cough syrup

Is the material in question Is the material in question physically separable?physically separable?

EQ’sEQ’s What are five physical What are five physical

separation techniques?separation techniques?

Physical Separation Physical Separation TechniquesTechniques

FiltrationFiltration- solid part - solid part is trapped by filter is trapped by filter paper and the liquid paper and the liquid part runs through the part runs through the paperpaper

VaporizationVaporization- where - where the liquid portion is the liquid portion is evaporated off to evaporated off to leave solidleave solid

Physical Separation Physical Separation TechniquesTechniques

DecantingDecanting- when - when liquid is poured off liquid is poured off after solid has settled after solid has settled to bottomto bottom

CentrifugeCentrifuge- machine - machine that spins a sample that spins a sample very quickly so that very quickly so that components with components with different densities different densities will separatewill separate

Physical Separation Physical Separation TechniquesTechniques

Paper Chromatography-Paper Chromatography- used to used to separate mixtures because different separate mixtures because different parts move quicker on paper than otherparts move quicker on paper than other

Classify the following as a Classify the following as a substance or a mixturesubstance or a mixture

SilverSilver Alphabet soupAlphabet soup Salt waterSalt water Table salt (sodium chloride)Table salt (sodium chloride) Motor oilMotor oil

PracticePracticeDetermine whether each of the following is element, Determine whether each of the following is element,

compound, homogeneous mixture or heterogeneous mixture.compound, homogeneous mixture or heterogeneous mixture.

airair zinczinc chlorinechlorine granitegranite aluminumaluminum sugar in watersugar in water bloodblood sucrosesucrose stainless steelstainless steel sodium chloridesodium chloride

brassbrass whole milkwhole milk appleapple table salttable salt soft drinkssoft drinks vinegarvinegar concreteconcrete sodiumsodium baking soda (NaHCObaking soda (NaHCO33)) gravelgravel

How do you separate different substances How do you separate different substances from a mixture?from a mixture?

You have just been given the latest You have just been given the latest creation of your science teacher. The teacher creation of your science teacher. The teacher presents you with a mixture of presents you with a mixture of sawdust, iron sawdust, iron filings, salt, and sandfilings, salt, and sand. He needs to separate . He needs to separate the mixture and wants your help. You are to the mixture and wants your help. You are to separate the mixture and find the total mass of separate the mixture and find the total mass of each of the substances in the mixture!each of the substances in the mixture!

You are to describe your proposed separation You are to describe your proposed separation plan. Present your plan to your teacher for plan. Present your plan to your teacher for approval. approval.

You will then conduct the experiment and You will then conduct the experiment and separate the mixtureseparate the mixture

Upon completion of the experiment each Upon completion of the experiment each member of the group will submit a final papermember of the group will submit a final paper

The Final Paper Must Include the The Final Paper Must Include the Following:Following:

**Introduction: Define a mixture and Introduction: Define a mixture and properties of the ingredients properties of the ingredients

in this in this mixture mixture

*Materials: List of lab equipment used*Materials: List of lab equipment used

*Procedures: Numbered step by step *Procedures: Numbered step by step procedures to took to separate the procedures to took to separate the

mixture mixture

*Results: Mass of each substance*Results: Mass of each substance

*Conclusion: A description of problems *Conclusion: A description of problems you encountered while conducting the you encountered while conducting the lab lab

Ideas as to how you could improve your Ideas as to how you could improve your methods to better separate each ingredient.methods to better separate each ingredient.