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Chemistry Final Exam Dr. Whitcomb
Exam 2 Quesitons -- Ch 5-7
55
Chemistry
Undergraduate 1
12/11/2010

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

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

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

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

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

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