Unit 1: Matter

Unit 1: MatterConcept: Structure of MatterUEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?Bell Work 09/19/2012

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Can you chemically break down an atom? Why or why not?Too much energy is required to break an atom down into its protons, neutrons, and electrons alone. It would require a nuclear reaction to do this.UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?Bell Work 09/20/2012

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Explain why is it easier to separate a heterogeneous mixture than a homogeneous mixture?

In a heterogeneous mixture, you can identify the components of the mixture

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?VocabularyWrite word and definition. Underline and highlight vocabulary word.Write word on front and definition on back of index cards.Create a poem or rap of vocabulary words and definitions.Create foldable with words and definitions.Create a crossword puzzle using words and definitions. Also make answer key!!!

AtomElementCompoundPure substanceMixtureHeterogeneous HomogeneousSolutionSoluteSolventConcentration

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?What are atoms?The smallest unit of an element that maintains the chemical properties of that element

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?What is matter?Anything with mass and volume (or takes up space)Matter can be broken into two categoriesPure Substances (1st)MixturesUEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?Pure SubstancesFixed, definite composition/uniform/unchanging

Pure substances can be broken down further into two more categories: elements and compounds

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?ElementsA substance that cannot be separated or broken down into simpler substances by chemical meansFound on periodic tableUEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?Compounds2+ atoms chemically boundMust break bonds to get elemental formMay form moleculesWaterCarbon dioxideLaw of Definite ProportionsThe law that states that a chemical compound always contains the same elements in exactly the same proportions by weight or mass

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?MixturesContains 2+ kinds of matter physically mixedCan be physically separatedBroken down into 2 main groupsHomogeneous Heterogeneous

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?Homogeneous MixturesLooks pure b/c evenly/uniformly mixedAlso called a solutionSolid in liquid (salt water)Gas in liquidSolid in solidAlloys-mixture of 2+ metalsSolid at room temperatureUEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?solutionsSolute substance being dissolved (sugar)Solvent substance doing the dissolving (water)RULE OF THUMB!!! USUALLY YOU WILL HAVE MORE SOLVENT THAN SOLUTE!!!What is solubility?Amount of solute that can be dissolvedConcentration high C high solute/solvent, low C low solute/solvent

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?HeterogeneousLooks impure Substances can be identifiedNot uniform throughout b/c unevenly mixedExamples: granite, wood, bloodAlso called suspensionsVisible particles settle

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?ColloidsEx. Milk, fog, clayLook like a solution b/c particles do not settle, but acts like a suspension b/c particles do not dissolveHow can you tell if it is a colloid?Tyndall effect scattering of light by particles in a mixtureUEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?SolutionColloidSuspension Does it settle?NoNo yesCan it be filtered?NoNoYesDoes it scatter light?NoYesYesUEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?Bell Work 09-21-2012

Write Question and AnswerHow can you tell a solution, suspension, and colloid apart from one another? Differentiate between the 3.

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?Bell Work 09-21-2012Write Question and AnswerHow can you tell a solution, suspension, and colloid apart from one another? Differentiate between the 3.Solution is a homogeneous mixture where particles are uniform throughout and does not settle. Suspensions are heterogeneous mixtures that have particles that settle and it is not uniform throughout. Colloids fall in between solutions and suspensions in that it has particles that do not settle (like solutions); but, the particles do not dissolve (like in suspensions). You can also use the Tyndall effect to differentiate colloids from solutions because colloids will scatter the light.

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?Methods for separating mixturesDistillationFiltrationChromatography

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?DistillationSeparating mixture by using differences in boiling pointsGood for separating solutionsHow? Heat mixture to the b.p. of the substance with the lowest b.p. This will create a vapor first. Collect and condense into a liquid in a separate container. Continue process if solution contains more than 2 substances.UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?FiltrationSeparating solid from liquid (and solid from solid; sieving)Use porous barrier to separateUEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?ChromatographySeparation technique that identifies parts of a mixture by how fast compounds move across a materialGreatest attraction moves the fastestUEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?Write question and answer.

Explain how you could separate sand and salt.

You could first add water to the solid mixture to form salt water. Filter the salt water from the sand. This will leave sand in the filter and salt water in the container. Then, through distillation process, heat the salt water to the waters boiling point so that you can collect and condense water vapor in separate container leaving only salt behind.

UEQ: In dealing with matter, how are composition, structure, properties and energy related? LEQ: How is matter classified?Write Questions and Answer

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