Pure Substances - monroe.k12.ky.us of Matter Notes Week 1.pdfA combination of two or more pure substances that are not chemically combined. substances held together by physical forces,

Pure Substances A sample of matter that has definite chemical

and physical properties.

Wednesday, January 9, 13

Pure Substances A sample of matter that has definite chemical

and physical properties.


Elements pure substance that cannot be separated into

simpler substance by physical or chemical means.


Elements pure substance that cannot be separated into

simpler substance by physical or chemical means.


Compounds

Pure substance composed of two or more different elements joined by chemical bonds.

Made of elements in a specific ratio that is always the same Has a chemical formula Can only be separated by chemical means, not physically


Compounds

Pure substance composed of two or more different elements joined by chemical bonds.

Made of elements in a specific ratio that is always the same Has a chemical formula Can only be separated by chemical means, not physically


Mixtures

A combination of two or more pure substances that are not chemically combined.

substances held together by physical forces, not chemical

No chemical change takes place Each item retains its properties in the mixture They can be separated physically

Chem4kids.com


Mixtures

A combination of two or more pure substances that are not chemically combined.

substances held together by physical forces, not chemical

No chemical change takes place Each item retains its properties in the mixture They can be separated physically

Chem4kids.com


Mixtures vs. Compounds

http://www.bbc.co.uk/schools/ks3bitesize/science/chemistry/elements_com_mix_6.shtml




Can you identify the following?You will be shown a series of photos. Tell if

each photo represents an item composed of an element, compound, or mixture.

Review: An element contains just one type of atom. A compound contains two or more different

atoms joined together. A mixture contains two or more different

substances that are only physically joined together, not chemically. A mixture can contain both elements and

compounds. Wednesday, January 9, 13

Element, Compound, or Mixture?Rocks


Element, Compound, or Mixture?Rocks


Element, Compound, or Mixture?

Copper



Copper



Copper



Jelly Beans



Jelly Beans



Table Sugar



Table Sugar



Table Sugar



Diamond



Diamond



Diamond



Tea



Tea



Salt



Salt



Salt



Neon Gas



Neon Gas



Neon Gas



Salad



Salad



Pure Water



Pure Water



Pure Water



Aluminum



Aluminum



Aluminum



Lemonade



Lemonade



Silver



Silver



Silver



Sand



Sand


Heterogeneous Mixtures

Type of matter consisting of at least two parts physically combined• Visible parts (phases)• Varying composition• Impure • Physically separable


keynote:/Users/TaraTurner/Library/Mobile%20Documents/com~apple~Keynote/Documents/Classification%2Bself%2B.key-tef?id=BGSlide-16


Heterogeneous Mixture Examples

Dirt Heterogeneous mixtures have more than one visible phase

Concrete Car




http://images.google.com/imgres?imgurl=http://www.racecarpartsdepot.com/images/T-Bird-chute2.jpg&imgrefurl=http://www.racecarpartsdepot.com/&h=387&w=500&sz=190&tbnid=35d3NTc7PicJ:&tbnh=98&tbnw=127&hl=en&start=18&prev=/images%3Fq%3Dcar%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8










http://propro.ru/go/Wshop/textures/images/concrete.jpg





Homogeneous Mixtures

Matter that is uniform throughoutReferred to as a Solution• 1 visible part (uniform

distribution)• Constant composition

throughout• Even distribution of

particles




http://images.google.com/imgres?imgurl=http://antoine.frostburg.edu/chem/senese/101/matter/images/homogeneous.gif&imgrefurl=http://antoine.frostburg.edu/chem/senese/101/matter/index.shtml&h=62&w=98&sz=3&tbnid=m58d8RO2nLkJ:&tbnh=48&tbnw=77&hl=en&start=48&prev=/images%3Fq%3Dhomogeneous%2Bmixture%26start%3D40%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8%26sa%3DN






http://images.google.com/imgres?imgurl=http://img.tfd.com/dict/113/753857-solution.jpg&imgrefurl=http://www.thefreedictionary.com/solution&h=128&w=125&sz=10&tbnid=re8O7F2_G-sJ:&tbnh=85&tbnw=83&hl=en&start=49&prev=/images%3Fq%3Dhomogeneous%2Bmixture%26start%3D40%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8%26sa%3DN





http://images.google.com/imgres?imgurl=http://www.yorktown.k12.in.us/yhs/teachers/clucas/3forchemistryteachers_files/Solution-Precipitate.jpg&imgrefurl=http://www.yorktown.k12.in.us/yhs/teachers/clucas/3forchemistryteachers.htm&h=354&w=353&sz=33&tbnid=FZE-KSi3P6IJ:&tbnh=117&tbnw=116&hl=en&start=8&prev=/images%3Fq%3Dsolution%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8





Solution (Homogeneous Mixture) Examples

Salt water Brass (A solution of metals=alloy)

Glass Solutions appear to be one part, but are actually just mixed very well


http://images.google.com/imgres?imgurl=http://www.wehug.com/Brass-sitting-kuan-yin-on-hand-47501b.jpg&imgrefurl=http://www.wehug.com/kuan-yin-quan-yin.html&h=474&w=421&sz=34&tbnid=ySYuanabbrwJ:&tbnh=126&tbnw=111&hl=en&start=6&prev=/images%3Fq%3Dbrass%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8






http://images.google.com/imgres?imgurl=http://science.nasa.gov/headlines/y2003/images/zeroglass/10501531.jpg&imgrefurl=http://science.nasa.gov/headlines/y2003/14apr_zeroglass.htm&h=432&w=640&sz=29&tbnid=oKKxQ9M2c8YJ:&tbnh=91&tbnw=135&hl=en&start=3&prev=/images%3Fq%3Dglass%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8












http://images.google.com/imgres?imgurl=http://thinks.com/jigsaw/buildings/glass.jpg&imgrefurl=http://thinks.com/cgi-bin/jigsaw.pl%3Fpuzz%3D/buildings/glass&h=313&w=400&sz=16&tbnid=ocJzpzfyOY8J:&tbnh=93&tbnw=120&hl=en&start=47&prev=/images%3Fq%3Dglass%26start%3D40%26svnum%3D10%26hl%3Den%26lr%3D%26ie%3DUTF-8%26sa%3DN




