unit 3: element compound mixture stuff Flashcards

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1
Q

element

A

cannot be split into two or more substances by chemical reactions

made of only ONE type of atom

atoms of each element is diff from atoms of any other element

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2
Q

compound

A
  • substance made up of two or more elements chemically combined together in a FIXED ratio, have a fixed composition
  • can only be broken down through chemical methods
  • different properties from that of its constituent elements
  • formed by chemical reactions
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3
Q

solution

A
  • kind of mixture
  • homogeneous (composition is uniform throughout)
  • solid dissolves completely, no solid particles can be seen
  • physical is same as solvent
  • solute cannot be filtered out of solvent
  • the solution is transparent
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4
Q

solute

A

substance that dissolves in solvent, usually solid

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5
Q

solvent

A

substance that dissolves the solute, usually liquid

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6
Q

what affects solubility?

A
  • type of solvent
  • type of solute
  • temperature of solvent
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7
Q

what affects rate of dissolving?

A
  • temperature of solvent
  • surface area of solute
  • rate of stirring
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8
Q

what is solubility (definition)

A

solubility is the maximum mass of solute that can dissolve in fixed volume of solvent at fixed temperature

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9
Q

suspension

A

-type of moisture
- solid particles are insoluble
- solid particles can be seen in suspension
- heterogeneous mixture (solid is unevenly distributed in liquid, mixture is not the same throughout)
- when left to stand, solid particles settle to bottom

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10
Q

which is impure?
a) element
b) compound
c) mixture

A

C. mixtures are impure
pure substances melt/boil at fixed temps. but impure substances melt/boil at a range of temps.

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11
Q

are compounds proportionate?

A

yes. the substances in a compound are in fixed ratios

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12
Q

which only has one kind of atom?
a) compound
b) element
c) mixture

A

B.
An element is made up of only one type of atom

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