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Matter & Mixtures
9
Type of Mixture: Colloids
Contain some particles that are intermediate in size between the small particles in a solution & the larger particles in a suspension.
Activity
- With your table partner: compare & contrast solutions, suspensions, and colloids
- Draw a picture, table, venn diagram, concept map, etc. comparing & contrasting these three types of solutions on your own paper.
- Make sure you & your partner's names are on the paper.
Matter & Mixtures
CLASSIFICATION OF MATTER
Pure Substance
Uniform composition throughout that does not vary from sample to sample
- element
- compounds
Mixture
Homogeneous
A blend of two or more kinds of matter, each of which retains its original properties
Heterogeneous
same throughout
different throughout
What is an atom?
Atom: smallest unit of an element that maintains the chemical identity of the element.
Element: pure substance that cannot be broken down into simpler substances and is made of only one type of atom.
Compound: substance that can be broken down into two or more elements chemically.
How big is an atom?
By the end of class you should be able:
Differentiate between atoms, elements, and compounds.
Distinguish between a pure substance & a mixture.
Bell Ringer
3
1. A plastic toy with a mass of 18 grams occupies 9.0 cm of space. What is the density of the plastic toy?
2. All of the following are units used to measure density EXCEPT:
3
A. g/cm
B. g/mL
C. kg/m
D. kg/N
3
Type of Mixture: Suspension
Heterogeneous mixture that separates into layers over time.
Type of Mixture: Solutions
Uniform mixtures where one or more substances are dissolved in another substance.
Two Parts:
1. Solvent: the substance doing the dissolving
2. Solute: the substance being dissolved
What is the solvent in salt water?
What is the solute in salt water?
3
2.0 g/cm