Transcript Chem is try - mathdotcom.org

Chemical…
JEOPARDY!
Chemical Jeopardy
Molarity
Electrons
EM
Radiation and ions
Atomic
Structure
Redox
Reactions
Potpourri
100
100
100
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100
100
200
200
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300
300
300
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300
300
400
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500
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500
Molarity 100
A solution of sodium hydroxide is prepared
from 8.5g solid NaOH dissolved in enough
water to give a final volume of 125.0 mL.
This is the molarity of that solution.
What is 1.7 M?
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Molarity 200
You would need to dissolve this many
grams of solid Cu(SO4)·5H2O in 735.0 mL
of dH2O to give a final concentration of
0.385M Cu(SO4)
What is 69.86g Cu(SO4)?
Chem is try
Molarity 400
The final concentration of 1.3 L of
Mg(NO3)2 is 0.22M. This was the original
concentration before 500 mL of dH2O were
added.
What is 0.3575 M Mg(N?O3)2?
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Molarity 300
22.0mL of a 3.25M stock solution of H3PO4
is diluted with dH2O to a final volume of
100.0mL. This is the molarity of the new
solution.
What is 0.715 M phosphoric acid?
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Molarity 500
55.0mL of a 1.225M of KNO3 is diluted to
70.0mL, at which point 2.36g solid KNO3
are added, without a change in volume.
This is the new molarity.
What is 1.30M KNO3?
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EM Radiation 100
h, or 6.63 x 10-34 J · sec
What is Planck’s Constant?
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EM Radiation 200
This is the frequency of an electromagentic
wave with λ = 65.0 cm.
What is 4.6 x 108 sec -1
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EM Radiation 300
If a photon of light carries 6.31 x 10-16 J
energy, this is its wavelength.
What is 315 pm?
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EM Radiation 400
A photon of infrared light whose
wavelength is 725nm carries this much
energy.
What is 2.74 x 10-19 J?
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EM Radiation 500
Looking at the chart below, green plants
will absorb light in the blue and red regions
of the electromagentic spectrum, but not
the green region. It is for this reason that
they appear green. These are the values
for the energy in joules carried by photons
of red and blue light, and this is the more
energetic “color” of photon.
Next:
Electrons and Ions 100
This is the name of the family of
elements that have seven valence
electrons.
What are the halogens?
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Electrons and Ions 200
Aluminum (Al) will most likely lose this
many electrons to gain the Nobel gas
configuration of neon
What are three electrons?
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Electrons and Ions 300
1s22s22p63s23p64s23d104p65s24d105p66s24f14
5d106p67s25f16d1
is the electron configuration of this element.
What is the electron configuration of
thorium?
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Electrons and Ions 400
If the phosphate polyatomic ion (PO4)
carries a charge of -3, this is the most
likely ionic formula of calcium phosphate.
What is Ca3(PO4)2
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Electrons and Ions 500
In the following equation, these are the
charges on the metal ions:
3Mg + 2Al(NO3)3  2Al + 3Mg(NO3)2
What are 0, +3, 0, and +2?
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Atomic Structure 100
With the exception of some of the lighter
atoms and the transition metals, atoms will
ionize to have this number of valence
electrons.
What are eight electrons?
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Atomic Structure 200
This is the name of the rule stating that
each electron in a given atom must have a
unique set of quantum numbers
What is Pauli’s Exclusion Principle?
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Atomic Structure 300
Using arrow notation and keeping in mind
Hund’s rule, this is the proper valence
electron configuration of sulfur.
What is ↓↑ ↑↓ ↑ ↑ ?
3s
3p
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Atomic Structure 400
This is the name of a decent mathematical
explanation of why a 4f orbital is more
energetic than a 6s orbital yet has a
smaller radius.
What are Schrodinger’s Equations?
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Atomic Structure 500
This is a decent description (in terms of orbitals
and allowable energy levels) of why we can run
a current through a tube of neon to get a pink
fluorescent light.
What did Bohr have to say about atomic
structure?
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Redox Reactions 100
This is the term given to an atom or ion
that has gained electrons.
What is reduced?
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Redox Reactions 200
This is the term given to an atom or ion
that accepts electrons from another atom
or ion.
What is an oxidizing agent?
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Redox Reactions 300
In the following reaction, this element is gaining
electrons and this element is losing them.
Mg + ZnSO4  Zn + MgSO4
What is zinc and what is magnesium ?
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Redox Reactions 400
Given the below equation, this is what an alternator
does, and why it is needed in a car battery:
Pb + PbO2 + 2H2SO4  2PbSO4 + 2H2O + Energy
What reverses direction of the reaction to replenish
the reactants (Pb and PbO2)?
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Redox Reactions 500
Given the data below, this is the relative reactivity of
copper, zinc, silver, and lead metal:
Cu + AgNO3  flakey solid forms
Cu + PbNO3  no observable reaction
Pb + CuNO3  metal darkens significantly
Zn + AgNO3  shiny solid forms
Pb + ZnNO3  no observable reaction
Answer: Ag, Cu, Pb, Zn
Chem is try
Potpourri 100
Grampa Simpson’s new hybrid car now gets
4.17 furlongs to the quart. This is the fuel
efficiency of his car in kilometers per liter
when 1 furlong = 7920 in, 1 in = 2.54 cm, 1
quart = 32 ounces, and 1 ounce = 29.57 mL
What is 0.889 km/L
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Potpourri 200
This element is formed when 235U gives off
three alpha particles and later emits two
beta particles.
What is 223Ra (radium)?
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Potpourri 300
On Superbowl Sunday, 25.0g of C2H6O
react with excess oxygen in a Steelers
fan’s liver. This many grams of carbon
dioxide are produced.
What are 47.83g CO2?
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Potpourri 400
An experiment that led to the formation of the
field of organic chemistry involved the synthesis
of urea, CN2H4O, by the controlled reaction of
ammonia, NH3, and carbon dioxide. This is the
theoretical yield of urea when 100.0g ammonia
is reacted with 100.0g carbon dioxide.
What is 136 g urea?
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Potpourri 500
Resonance, Gibb’s free energy,
things tend towards low potential
energy, carbon makes four bonds,
and Le’Chatelier’s Principle.
What are the five things Mr. P really cares about in chemistry?
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EM Radiation 500(b)
What are XXXX J and YYYYY J and what is blue light?
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