![Page 1: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/1.jpg)
8/29/2011Objectives:Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions.Interpret and create models (words or pictures) that represent atoms, molecules, elements, compounds, and mixtures at the particle level.
Catalyst:Convert the following: 1. 0.25 km to nm2. 7.3 cL to L
![Page 2: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/2.jpg)
Drawing Atoms
• Atoms are the smallest unit of matter• They are too small to see except with
the most powerful microscopes, so we draw them to help us understand
![Page 3: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/3.jpg)
What do we call these things?
An Atom
3 Atoms
![Page 4: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/4.jpg)
Drawing molecules
• Molecules are groups of atoms that are joined together
• These atoms can be of the same or different elements
![Page 5: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/5.jpg)
![Page 6: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/6.jpg)
![Page 7: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/7.jpg)
Substances
• All molecules are the same–Element: all atoms are the same–Compound: there are different atoms
within the molecule, but each molecule is the same
![Page 8: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/8.jpg)
![Page 9: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/9.jpg)
This molecule is 2 atoms joined together but we don’t call it “2 atoms
joined together” we say it is one molecule
This molecules is 4 atoms of two different
types joined together to make a compound
element
compound
![Page 10: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/10.jpg)
Pure substances include:• Elements are found on the periodic table
– Some elements are: iron, gold, silver, aluminum, and carbon
• Compounds are bonded groups of atoms– some basic compounds are:
Carbon monoxide (CO), and carbon dioxide (CO2), water (H2O), hydrogen peroxide (H2O2).
![Page 11: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/11.jpg)
![Page 12: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/12.jpg)
![Page 13: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/13.jpg)
![Page 14: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/14.jpg)
Mixtures• Molecules are not all the same
![Page 15: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/15.jpg)
Element vs.Compounds vs. mixtures
Element Compound MixtureSingle atom two different two or moreOr group of atoms joined molecule typesSame atoms *heterogenous
(looks different
throughout) *homogenous (looks the
same throughout)
![Page 16: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/16.jpg)
Many things we experience are mixtures of elements and compounds:• Heterogenous:
• Coke (bubbles)• Milk (globs of fat)• Chocolate chip cookies (chocolate chips)
• Homogenous:• Kool-Aid• The air • Vinegar
![Page 17: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/17.jpg)
![Page 18: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/18.jpg)
Homogenous v. HeterogenousAtoms/Molecules evenly spread throughout
Atoms/Molecules separated or “clumped”
![Page 19: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/19.jpg)
![Page 20: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/20.jpg)
(Gas)
atoms of one Element
Atoms of the same Element
(Solid)
![Page 21: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/21.jpg)
This one likes to go round in pairs as a
gas (molecules)
Another element A mixture of two elements
![Page 22: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/22.jpg)
This is not a mixture, it is a
COMPOUND of two elements
This is just a mixture of two
elements
![Page 23: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/23.jpg)
Definitions• Matter – anything that occupies space and has
mass• Physical properties – properties that can be
observed and measured without changing the chemical makeup of the substance
• Density – mass of material within a given volume
• Aqueous solution – a solution in which something is dissolved in water.
![Page 24: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/24.jpg)
Definitions• Mixture – combination of substances in which
each substance retains its individual properties• Suspension – a mixture containing large,
dispersed solid particles that can settle out or be separated by filtration
• Colloid – a mixture containing solid particles small enough to remain suspended and not settle out
• Tyndall effect – the scattering of a beam of light caused by reflection from suspended particles
![Page 25: 8/29/2011 Objectives: Distinguish that homogenous mixtures are solutions and heterogeneous mixtures are colloids or suspensions. Interpret and create models](https://reader030.vdocuments.us/reader030/viewer/2022032414/56649ef35503460f94c054ce/html5/thumbnails/25.jpg)
Definitions• Solution – a homogeneous mixture of two or
more substances• Solvent – the thing doing the dissolving• Solute – the thing getting dissolved