Chemistry Final Exam Dr. Whitcomb Answers – Flashcards

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question
NaCl + H2O ----> Na+ (aq) + Cl- (aq) is an example of ionization.T or F
answer
False.
Ionization is when an atom or molecule gains either a positive or negative charge.
(The example shown is "dissociation.")
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"Redox" means the same thing as "oxidation-reduction." T or F
answer
True.
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Spectator ions are the soluble components of a precipitation reaction. T or F
answer
True.
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Ammonium nitrate is NH4NO3.T or F
answer
True.
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MnOH2 means the same thing as Mn(OH)2.T or F
answer
False.
In the second compound, the parentheses indicate that the polyatomic ion hydroxide is receiving Mn's 2 positive charges.
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Sometimes an oxidation reaction will occur without a reduction reaction.
T or F
answer
False.
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The formation of gas bubbles is ALWAYS indicative of a chemical reaction.
T or F
answer
False.
That can also be evidence of a physical change.
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A combustion reaction must include O2.T or F
answer
True.
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The complete ionic equation does not include the spectator ions.
T or F
answer
False.
It's the NET IONIC EQUATION that does not include the spectator ions.
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Potassium hydroxide is an example of a salt.
T or F
answer
True. Pretty much anything combining with (OH)- will be a salt.
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H3PO4 is hydrophosphoric acid.T or F
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False.
It's just phosphoric acid.
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KNO3 dissolved in H2O produces K+ (aq) + N3- (aq) + 3O2- (aq) ions. T or F
answer
False. NO3- is an ion that stays bonded.
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Products of some reactions can be predicted by knowing their solubilities.
T or F
answer
True.
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Sodium bromide is an example of a weak electrolyte.
T or F
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False.
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Strong electrolytes that produce H+ are strong acids.T or F
answer
True.
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Na0 ---> Na+ + 1e- is an example of an oxidation reaction.T or F
answer
True.
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The correct formula for barium sulfate is BaSO4.T or F
answer
True.
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Which of the following is NOT one of the four driving forces for a chemical reaction?
a. gas formation
b. transfer of electrons
c. solid formation
d. water formation
e. heat or flame
answer
e. heat or flame
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Elemental Copper can be oxidized with elemental sulfur, the reduction reaction is written:a. Cu --> Cu+ + 1 e-b. Cu --> Cu+ - 1 e-c. Cu + 1 e- --> Cu+ d. S --> S2- + 2e-e. S + 2e- --> S2-
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e. S + 2e- ---> S2-
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The net ionic equation for an acid-base reaction is:
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H+ + OH- ---> H2O
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The four visible clues that a chemical reaction has occurred are:
answer
1. color change
2. precipitate formation
3. gas formation
4. heat or flame
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The 4 driving forces for all chemical reactions are:
answer
1. Solid formation
2. Water formation
3. Electron transfer
4. Gas formation
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Which ion (on the left side of the equation) is getting reduced and which on is getting oxidized in the following redox reaction?FeCl2(aq) + CuCl2(aq) ---> FeCl3(aq) + CuCl(aq)
answer
Fe lost an electron, so it's getting oxidized.
Cu gained an electron, so it's getting reduced.
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What is the oxidation reaction (written-out) for:3Na + Co(NO3)3 ---> 3NaNO3 + Co0
answer
Na0 ---> Na1+ + 1e-
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Name this compound:Al2S3
answer
Aluminum Sulfide
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Name this compound:CoO2
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Cobalt (IV) Oxide
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Name this compound:Li3P
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Lithium Phosphide
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Name this compound:P2O5
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diphosphorus pentoxide
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Name this compound: C2H3O2-
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Acetate ion
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Name this compound:S2-
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sulfide ion
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Name this compound:
HF
answer
hydrofluoric acid
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Write the formula:
Potassium hydroxide
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KOH
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Write this formula:
Chromium(IV) oxide
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CrO2
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Write this formula:
Nitric acid
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HNO3
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Write this formula:
Dinitrogen Trioxide
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N2O3
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Write this formula:
Ammonia
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NH3
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Write the formula:
Aluminum hydroxide
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Al(OH)3
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Write the formula:
Carbonate
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CO32-
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Correct the formula:AgCl2
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AgCl
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Correct the formula:Ba2(NO3)4
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Ba(NO3)2
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Correct the formula: Li3CO3
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Li2CO3
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Correct the formula:K+Cl-
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KCl
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Correct the formula:NO3Li
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LiNO3
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This name is incorrect; what's the correct name?

monosilicon tetrachloride
answer
silicon tetrachloride
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This name is incorrect; what's the correct name?

silver(I) nitrate
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silver nitrate
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This name is incorrect; what's the correct name?

iron tetrafluoride
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iron(IV) fluoride
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This name is incorrect; what's the correct name?

barium dichloride
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barium chloride
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This name is incorrect; what's the correct name?

hydro-phosphoric acid
answer
phosphoric acid
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Balance the following equation:WC4(s)+ H2O ---> W(OH)4 + C2OH2O
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WC4(s)+ 4H2O ---> W(OH)4 + 2C2OH2O
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The Arrhenius definition of an acid is:
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a substance that, when dissolved in HWC4(s)+ H2O, releases H+ ions.
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Write and balance an acid-base reaction you can think of (not the net ionic reaction:)
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HCl + KOH ---> H2O + KCl
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Determine the products of this reaction:H2S(aq) + Pb(NO34 (aq) --->
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HNO3(aq) + PbS2
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Stomach acid is hydrochloric acid and reacts if you swallowed some magnesium hydroxide. What's the correct formula of each reactant?
The correct formula of each product?
answer
HCl and Mg(OH)2H2O and MgCl2
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Write a balanced equation of HCl reacting with Pb(OH)2
answer
2HCl + Pb(OH)2 ---> 2 H2O + PbCl2
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Show, using Lewis dot structure, how 2H+ are reduced to become H2 (in other words, write the reduction reaction for H+):
answer
H• •H ----> H:H2H+ + 2e- ---> H2
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