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IPC ch 6
chapter 6
40
Science
9th Grade
02/09/2016

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Term
Heterogeneous Mixtures
Definition
a mixture of different substances. NOT the same throughout (non-uniform).
Term
Suspension
Definition
a heterogeneous mixture that looks uniform, but eventually the substances separate.EX Orange Juice
Term
Colloid
Definition
a heterogeneous mixture of very tiny particles that DO NOT settle out of the mixture. EX. Jello, egg white
Term
Liquid-liquid heterogeneous mixture
Definition
when liquids are immiscible (they don’t mix). EX. Oil and vinegar.
Term
Emulsion
Definition
a colloidal mixture of immiscible (normally don’t mix) liquids in which the liquids are spread throughout one another. EX. mayonnaise, vinegar and water
Term
Homogeneous Mixtures
Definition
uniform blend throughout.
Term
Solution
Definition
a homogeneous mixture of two or more substances uniformly spread throughout a single phase.
Term
Solute
Definition
the substance that dissolves.
Term
Solvent
Definition
the substance in which the solute dissolves.
Term
Miscible
Definition
liquids that mix.
Term
Dissolving process
Definition
high energy particles hit low energy particles, causing them to break away, separate and move faster. (High energy particles transfer KINETIC ENERGY to them.)
Term
stir/shake
increase temperature
increase surface area
Definition
How can you increase the rate a solute dissolves?
Term
small pieces dissolves faster than large pieces (because there is more surface area)
Definition
How does SIZE increase the rate of dissolving?
Term
increasing temperature helps the solute dissolve faster in hot water.
Definition
How does temperature increase the rate of dissolving?
Term
stirring allows more water molecules to collide with the undissolved sugar.
Definition
How does stirring/shaking increase the rate of dissolving?
Term
Water
Definition
What is known as the universal solvent?
Term
It dissolves most substances.
Definition
Why is water known as the universal solvent?
Term
Polar dissolve polar.
Non-polar dissolve non-polar.
Definition
Like dissolves like
Term
Polar
Definition
partially charged atoms are attracted to each other.
Term
Dilute solution
Definition
small amount of solute into large amount of solvent. (weak tea)
Term
Concentrated solution
Definition
large amount of solute in a small amount of solvent.
Term
Unsaturated
Definition
solution able to dissolve more solute.
Term
Saturated
Definition
solution cannot dissolve any more solute.
Term
Solubility
Definition
the greatest amount of a solute that will dissolve in a given quantity of solvent to produce a saturated solution.
Term
Increase the temperature. HEAT
Definition
How can you dissolve more solute into an already saturated solution?
Term
Super saturated solution
Definition
a solution holding more dissolved solute than is specified by its solubility at given temperature
Term
Concentration
Definition
the quantity (amount) of solute dissolved in a given quantity of solution.
Term
Molarity
Definition
A concentration unit of a solution that expresses mole of solute dissolved per liter of solution.
Term
Acid
Definition
sour, corrosive substance that donates a hydrogen ion, H+, to form
hydronium ions, H30+, when dissolved in water.
Term
Indicators
Definition
a compound that can reversibly change color in a solution.
Helps you determine whether a solution is acidic, basic, neutral.
Term
Strong acid
Definition
Donates ALL available H+ ions to the water molecules to form H3O+ ions.
Very Good at conducting electricity.
Term
Weak acid
Definition
does NOT donate all H+ ions to water molecules. Does NOT conduct electricity as
well.
Term
Bases
Definition
bitter,slippery substance that either contains OH-, hydroxide ions, or reacts
with water to form hydroxide ions.
Term
pH
Definition
a measure of the concentration of H3O + , hydronium ions, in a solution.
Tells us how acidic, basic or neutral a solution is.
Term
pH
Definition
Indicates the H3O+, hydroxide ion, concentration.
Term
pH < 7 =
Definition
acidic (Ex. apple juice)
In an acidic solution the hydronium ions are greater than the hydroxide
ions.
Term
pH > 7 =
Definition
basic (Ex. Ammonia) “BASIC X”
In a Basic solution the hydroxide ions are greater than the hydronium ions.
Term
Neutral
Definition
solution has a pH of 7 (Ex. Water)
Concentration of hydronium ions equals the concentration of hydroxide
ions.
Term
Neutralization reaction
Definition
occurs when the hydronium ions (from the acid) and
the hydroxide ions (from the base) react to form water molecules.
(the remaining ions, the positive (from the base) and negative (from the
acid) form a salt.
Term
Salt
Definition
an ionic compound composed of cations bonded to anions, other than oxide or hydroxide ions. Most are often soluble in water.
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