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CH 16
Acid-Base Titration and pH
33
Chemistry
10th Grade
03/24/2010

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Term
self ionization of water
Definition
two water molecules produce a hydronium ion and a hydroxide ion by transfer of a proton
Term
Molarity
Definition
1.0 x 10^-7 M = mol solute/Liter solute
Term
kw constant
Definition
[h3o+][OH-]
[1.0x10^-7][1.0x10^-7]
1x10^-14 M^2
Term
neutral
Definition
any solution inb which hydronium and hydroxide ion concentrations are the same is ___________
Term
acidic
Definition
solutions in which the hydronium ion concentraion is greater that the hydroxide concentration
Term
basic
Definition
solutions in which the hydroxide ion concentration is greater that the hydronium ion concentration is ______
Term
acidic
Definition
if the hydronium concentration is increased to over 1x10^-7, then the solution is _________
Term
basic
Definition
if the hydronium concentration is less than 1x10^-7, then the solution is _________
Term
pH
Definition
-log[h3o]
Term
pOH
Definition
-log[OH]
Term
if yu kno the pH and yu want the separate hydronium and hydroxide concentration, use antilog.
Definition
formula= antilog(-pH)
Term
acid-base indicators
Definition
compounds whose colors are sensitive to pH
Term
write general equilibrium expression of an indicator
Definition
HIn --> H+ + In-
Term
HIn
Definition
in acidic solutoins, the indicator is present in largely non-ionized form, or _____
Term
In-
Definition
in basic solutions, the indicator is present largely in the form of its anion, or _______
Term
transition interval
Definition
the pH range over which an indicator changes color is called its _____-
Term
mixing several different indicators
Definition
universal indicators are made by _______________
Term
voltage between the two electrode that are placed in the solution
Definition
a pH meter determines the pH of a solution by measuring ____________
Term
strong acid/strong base
Definition
pH range= 4.4-7.6
Term
strong acid/weak base
Definition
pH range= 3.0-4.6
Term
weak acid/ strong base
Definition
pH range= 6.4-10.0
Term
titration
Definition
adding a known amount of a substance to an unknown amout of another substance to calculate the unknown amount
Term
very rapid change in titrations
Definition
it is a very rapid change that occurs when H+ and OH- ions are changing
Term
describe the rate of change in a titration
Definition
speed of pH is slow at first. it gets faster, then speeds rapidly, and evens back out after the end point
Term
titrations provide a sensitive means of determining the chemical equivalent volumes of acidic and basic solutions
Definition
Term
equivalence point
Definition
the _______ is the pont at which the two solutions used in a titration are present in chemically equivalent amount
Term
pH meter
Definition
a _________ will show a lare voltage charge occuring ath the equivallence point
Term
7
Definition
when a strong acid is titrated with a strong base, the equivalence point occurs at about _____-
Term
7
Definition
when a strong acid is titrated with a strong base, the equivalence point occurs at about _____-
Term
less than 7
Definition
when a strong acid is titrated with a weak base, the equivalence point has a pH ____________
Term
more than 7
Definition
when a strong base is titrated with a weak acid, the equivalence point occurs at a pH of about __________
Term
standrd solution
Definition
the solution that contains the precisely known concentration of a solute
Term
primary standard
Definition
a highly purified solid compound used to check the concentration of the known solution in a titration
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