chemistry quiz 3

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Author:
anitaebrahimi
ID:
284132
Filename:
chemistry quiz 3
Updated:
2014-09-26 01:03:48
Tags:
chemistry
Folders:
chem
Description:
chemistry
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  1. pure substance
    element or compound, cannot be physically separated
  2. mixture
    • can be physically separated,
    • if its same--- homogeneous
    • if its not the same---- heterogeneous
  3. 2 heterogeneous mixtures
    and their description
    • colloid- not big enough to be filtered
    • suspension- particles are big enough to be separated
  4. compound
    combination of elements
  5. elements
    on periodic table
  6. heterogeneous mixtures
    different looks

    ex. Ice and water
  7. homogeneous
    have same looks

    ex. salt dissolved in water
  8. when do you use filtration and evaporation
    filtration- for suspension

    evaporation- colliod
  9. physical and chemical properties
    • physical- doesn't change the chemical identity
    • chemical- changed chemical identity (a wood rotting)
  10. intensive vs. extensive
    intensive- properties don't changeĀ  (you could have any amount of substance and it wouldn't change -ex density, color, etc)

    extensive- the amount changes based on amount of substance you are using

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