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27 Cards in this Set
- Front
- Back
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In all chemical and physical reactions there is neither a gain or loss in mass due to what law?
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The Law of Conservation of Mass.
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The melting point of a substance is "EXACTLEY THE SAME" as what?
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Its freezing point.
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What is solubility?
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A characteristic property of a given solid in a given volume of liquid at a given temperature/or/
the characteristic property of how dissolvable a solid is. |
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What is a Solute?
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the solid that is dissolved.
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what is a solvent?
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the liquid that does the dissolving.
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what is a solution?
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2 substances equally mixed together.
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what is a concentration?
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the mass of solid per given volume of liquid
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What is a precipitate?
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the amount of solid coming out of a saturated solution as a substance is cooled.
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what is a mixture?
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a substance formed when 2 or more elements or compounds do NOT unite in a fixed ratio.
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what is a compound?
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a substance formed when 2 or more elements or compounds DO unite in a fixed ratio.
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what is an element?
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a simple substance that cannot be divided into simpler substances by ordinary chemical means (heat, electricity, acids or bases).
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what is a pure substance?
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an element or compound that cannot be separated by physical means (distillation, filtering, fractional crystallization, skimming, or paper chromatography)
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what does density equal?
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mass divided by volume.
or M / V |
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what does volume equal?
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Mass divided by density.
or M / D |
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what does mass equal?
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Volume times density.
or V x D |
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what does volume equal?
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Length times width times height.
or L x W x H |
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define homogenous
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the appearance of 1 pure substance.
like homogenized milk. (cant see different parts to it, looks all the same) |
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define heterogenous
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the appearance of 2 or more parts to a substance.
can NOT be a pure substance. |
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Tests for Gases:
A) Hydrogen- |
Tests for Gases:
Soft pop |
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Tests for Gases:
B) Carbon Dioxide |
Tests for Gases:
both glowing and burning splints go immediately out. |
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Tests for Gases:
C) Ammonia |
Tests for Gases:
distinctive odor, and very soluble in water. |
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Tests for Gases:
D) Oxygen |
Tests for Gases:
Glowing splint bursts into flame |
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Means of Physical Separation:
define: A) Distillation |
the separation of different liquids or gases by means of their different boiling points.
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Means of Physical Separation:
define: B) Filtering |
the separation of different solids by means of their very DIFFERENT SOLUBILITIES. (SOLUBLE, INSOLUBLE)
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Means of Physical Separation:
define: C) Fractional Crystallization |
the separation of different solids by means of their different SOLUBILITIES at DIFFERENT TEMPERATURES.
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Means of Physical Separation:
define: D) Skimming |
the separation of different solids by means of their DIFFERENT DENSITIES.
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Means of Physical Separation:
define: E) Paper Chromatography |
the separation of different pigments by means of their DIFFERENT SOLUBILITIES.
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