JEOPARDY!
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Chemistry Final Review
Chapter 6: Solutions
By: Dmitry Gulak
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Bill Arcuri, WCSD
JEOPARDY!
Concentr
ation
Boiling
Point
Elevation
Freezing
Point
Depressio
n
Stoichio
metry
100
100
100
100
100
200
200
200
200
200
200
300
300
300
300
300
300
400
400
400
400
400
400
500
500
500
500
500
500
Properties
of
Solutions
pH
100
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The process of water
molecules pulling away the
ions from an ionic
compound.
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What is hydration?
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The process of breaking up an
ionic compound into the
separate ions.
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What is ionization or dissociation
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The difference between a
strong and weak electrolyte
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The ions that break apart or
not.
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When a solution that can hold
all the possible solute
possible.
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What is a saturated solution
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Is a weak electrolyte because
there are few ions to conduct
electricity
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Any weak acid, covalent compound, or
insoluble ionic compound
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What is the pH equation
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pH=-log[H3
+
O]
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What is a stong acid vs.
weak acid
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A strong acid has more
dissociation than a weak
acid.
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What is the equation for the
auto ionization of water
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[H3
+
O]
x
[OH ]
= 1.0 x
-14
10
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Find the hydronium
concentration of a solution
with a pH of 10.7
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[H3
+
O]
-pH
10
-10.7
10
=
=
-11
1.99x 10 M
=
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What is the pOH equation
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pOH =
-log[OH ]
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What is percent
concentration
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%(W/V) = mass solute /
volume solution in mL *
100
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What is molarity
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moles solute / L solution
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Find the molarity of a
solution that has 26.5g
NaCl in 500mL solution
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26.5g NaCl /58.44g/mol
NaCl = .453mol NaCl
500mL /1000 = .5L
.453mol NaCl / .5L =
.906M NaCl
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A solution is .55M CaCl2. find
the concentration of the ions
CaCl2 -> Ca+2 + 2 Clfind the Ca+2 ion
concentration.
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For every one CaCl2
+2
there will be 1 Ca ion.
+2
You will get 1 Ca mole
for every 1 CaCl2 mole.
The concentration of
+2
Ca is .55M
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A solution is .55M CaCl2.
find the concentration of the
ions
CaCl2 -> Ca+2 + 2 Clfind the Cl ion
concentration.
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For every 1 CaCl2 there
will be 2 Cl ions. The
concentraion of Cl is
1.1M
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determine the boiling point
elevation of H2O in 2.5 M
solution of C6H12O6
(glucose)
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2.5M C6H12O6 Elevation =
0.512*2.5 =1.28
Boiling point
elevation=1.28°C
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What is the boiling point
elevation when 11.4 g of
ammonia (NH3) is dissolved
in 200. g of water? Kb for
water is 0.52 °C/m.
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Determine molality of 11.4 g of
ammonia in 200. g of water:
11.4 g / 17.031 g/mol =
0.6693676 mol0.6693676 mol
/ 0.200 kg = 3.3468 m
Δt = i Kb mΔt = (1) (0.52 °C/m)
(3.3468 m)
Δt = 1.74 °C
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What is boiling point elevation
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Boiling-point elevation describes
the phenomenon that the boiling
point of a liquid (a solvent) will be
higher when another compound is
added, meaning that a solution has a
higher boiling point than a pure
solvent.
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What is the boiling point elevation
equation
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ΔTb = iKbm
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What does ΔTb = iKbm mean
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“i” is number of ions
Kb is constant given in back
of book
m is molality
t is temperature
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What is freezing point
depression?
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Freezing point depression occurs
when the freezing point of
a liquid is lowered by adding
another compound to it. The
solution has a lower freezing
point than that of the
pure solvent.
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Freezing point depression will do
what to waters freezing point
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Make it go below 32
degrees F or 0
degrees C
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What is the freezing point
depression equation
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ΔTF = KF · b · i
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What does ΔTF = KF · m · I mean
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“i” is the number of
ions
Kf is a constant
T is temperature
m is molaity
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What is
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A more accurate
equation for freezing
point depression
made by Ge and
Wang
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What is Stoichometry
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Stoichiometry is a
branch of chemistry that
deals with the relative
quantities
of reactants and product
s in chemical reactions
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Based on the balanced equation
2 AgNO3 + 1 BaCl2 -> 2 AgCl + 1
Ba(NO3)2 how many grams of
barium nitrate will be produced if
15.5g of AgNO3 reacts?
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15.5g AgNO3
/169.91g/2mol AgNO3 *
261.32g Ba(NO3)2 =
11.9g Ba(NO3)2
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How many grams of NaOH are
needed to neutralize 250ml of a
.1M H2CO3 solution?
Balanced equation: H2CO3 + 2
NaOH -> Na2CO3 + 2 H2O
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.250L H2CO3 *.1mol
H2CO3 /1L H2CO3 * 2
mol NaOH / 1 mol
NaOH * 40g NaOH / 1
mol NaOH = 2.00g
NaOH
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What is STP
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Standard Temperature and
Pressure, 0 degrees C, 1
atm
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What is a titration
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A titration is a lab
technique in which a
solution of known
concentration reacts with
a solution of unknown
concentration.
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Final Jeopardy
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What is the indicator
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Phenolphthalein
normally used for
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• It turns pink in a titration when the
solution turns basic.
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