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Chem Quiz 4-20
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39
Chemistry
11th Grade
04/19/2015

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Term
What has components that are obviously different?
Definition
Heterogeneus Mixtures
Term
A heterogeneous mixture always contains
Definition
two or more substances that are visibly distinguishable
Term
What is a pure substance?
Definition
Water
Term
This is a heterogeneous mixture.
Definition
Whole-heat bread
Term
This is a homogeneous mixture.
Definition
sugar-water solution
Term
What is a thoroughly mixed homogeneous mixture of substance in a single phase?
Definition
a solution
Term
This is not a homogenous mixture
Definition
sodium chloride
Term
This is a heterogeneous mixture
Definition
tap water
Term
What is not a solute-solvent combination?
Definition
gas-solid combination
Term
Water in air is an example of which solute-solvent combination?
Definition
liquid gas
Term
Carbon dioxide in water is an example of which solute-solvent combination?
Definition
gas- liquid
Term
Sugar in water is an example of which solute-solvent combination?
Definition
solid- liquid
Term
Oxygen in nitrogen is an example of which solute solvent combination?
Definition

gas- gas

 

Term
What mixture contains visible particles that settle out unless the mixture is stirred?
Definition
a suspention
Term
What mixture contains particles that are in a dispersed phase and do not settle out?
Definition
a colloid
Term
A metal solution is an
Definition
alloy
Term
An aerosol dispenser contains a colloidal dispersion of
Definition
a gas and a liquid
Term
The colloidal particles in a colloid form the
Definition
dispersed phase
Term
Colloids
Definition
scatter light
Term
The Tyndall effect is used to distinguish between
Definition
solutions and colloids
Term
A substance whose water solution conducts a current is an
Definition
electrolyte
Term
To conduct electricity, a solution must contain
Definition
ions
Term
This is an electrolyte?
Definition
sodium chloride
Term
A substance whose water solution does NOT conduct a current is an?
Definition
nonelectrolyte
Term
What is a molecular substance whose water solution conducts electricity?
Definition
hydrogen chloride
Term
This is a nonelectrolyte?
Definition
sugar
Term
Molecules whose water solutions conduct current
Definition
ionize in water
Term
The dissolution of gases in liquid is generally
Definition
exothermic
Term
Heat of solution is generally expressed in
Definition
kilojoules per mole of solute at a specified temperture
Term
What is the value of solution at 25c represents the greatest release of energy?
Definition
-3.59 kJ/mol
Term
The formation od solid-liquid solutions
Definition
can either absorb or release heat
Term
Pressure has the greatest effect on the solubility of
Definition
gases in liquids
Term
The solubitity of gases in liquids
Definition
always increases with increasing pressure
Term
Henry's law relates
Definition
pressure to gas-liquid solubility
Term
For a mixture of gases, the solubility of each gas in water varies
Definition
directly with the partical pressure of the gas
Term
Effervescence is the
Definition
escape of gas from a gas- liquid solution
Term
As temperture increases, solubility of gases in liquids
Definition
decreases
Term
As temperture increases, solubility of solids in liquids
Definition
usually increases
Term
Cesium sulfate is a typical solid whose solubility decreases
Definition
with increasing tempertures
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