Chemistry Final Exam Dr. Whitcomb Answers – Flashcards
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| NaCl + H2O ----> Na+ (aq) + Cl- (aq) is an example of ionization.T or F |
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| 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 |
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| True. |
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| Spectator ions are the soluble components of a precipitation reaction. T or F |
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| True. |
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| Ammonium nitrate is NH4NO3.T or F |
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| True. |
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| MnOH2 means the same thing as Mn(OH)2.T or F |
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| 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 |
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| False. |
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| The formation of gas bubbles is ALWAYS indicative of a chemical reaction. T or F |
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| False. That can also be evidence of a physical change. |
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| A combustion reaction must include O2.T or F |
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| True. |
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| The complete ionic equation does not include the spectator ions. T or F |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| True. |
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| Na0 ---> Na+ + 1e- is an example of an oxidation reaction.T or F |
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| True. |
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| The correct formula for barium sulfate is BaSO4.T or F |
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| 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 |
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| 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: |
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| 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: |
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| 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) |
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| 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 |
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| Na0 ---> Na1+ + 1e- |
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| Name this compound:Al2S3 |
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| 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 |
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| 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 |
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| 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 |
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| 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? |
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| HCl and Mg(OH)2H2O and MgCl2 |
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| Write a balanced equation of HCl reacting with Pb(OH)2 |
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| 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+): |
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| H• •H ----> H:H2H+ + 2e- ---> H2 |
