Chemistry

Q: Write a balanced net ionic equation for the reaction of NiBr2(aq) with (NH4)2S(aq).A) NiBr2(aq) + (NH4)2S(aq) -> NiS(s) + 2 NH4Br(aq)B) Ni2+(aq) + 2 Br-(aq) + 2 NH4+(aq) + S2-(aq) -> NiS(s) + 2 NH4+(aq) + 2 Br-(aq)C) Ni2+(aq) + 2 Br-(aq) + 2 NH4+(aq) + S2-(aq) -> NiS(s) + 2 NH4Br(s)D) Ni2+(aq) + S2-(aq) -> NiS(s)

Q: Write a balanced net ionic equation for the reaction of AgNO3(aq) with KBr(aq).A) AgNO3(aq) + KBr(aq) -> AgBr(aq) + KNO3(s)B) Ag+(aq) + NO3-(aq) + K+(aq) + Br-(aq) -> Ag+(aq) + Br-(aq) + KNO3(s)C) Ag+(aq) + NO3-(aq) + K+(aq) + Br-(aq) -> AgBr(s) + K+(aq) + NO3-(aq)D) Ag+(aq) + Br-(aq) -> AgBr(s)

Q: Write a balanced net ionic equation for the reaction of AgNO3(aq) with Cu(s).A) AgNO3(aq) + Cu(s) -> Ag(s) + CuNO3(aq)B) Ag+(aq) + Cu(s) -> Ag(s) + Cu+(aq)C) 2 AgNO3(aq) + Cu(s) -> 2 Ag(s) + CuNO3(aq)D) 2Ag+(aq) + Cu(s) -> 2 Ag(s) + Cu2+(aq)

Q: Write a balanced net ionic equation for the reaction of Na2CO3(s) and HCl(aq).A) Na2CO3(s) + 2 HCl(aq) -> 2 NaCl(aq) + H2O(l) + CO2(g)B) 2Na+(aq) + CO32-(aq) + 2H+(aq) + 2Cl-(aq) -> 2Na+(aq) + 2Cl-(aq) + H2O(l) + CO2(g)C) Na2CO3(s) + 2 H+(aq) -> 2 Na+(aq) + H2O(l) + CO2(g)D) CO32-(aq) + 2 H+(aq) -> H2O(l) + CO2(g)

Q: Write a balanced net ionic equation for the reaction of H2SO4(aq) with Ba(OH)2(aq).A) H2SO4(aq) + Ba(OH)2(aq) -> BaSO4(s) + 2 H2O(l)B) 2 H+(aq) + SO42-(aq) + Ba2+(aq) + 2 OH-(aq) -> BaSO4(s) + 2 H2O(l)C) H+(aq) + OH+(aq) -> H2O(l)D) Ba2+(aq) + SO42-(aq) -> BaSO4(s)

Q: Write a balanced net ionic equation for the reaction of Pb(NO3)2(aq) with NaI(aq).A) Pb(NO3)2(aq) + 2 NaI(aq) -> PbI2(s) + 2 NaNO3(aq)B) Pb2+(aq) + 2 NO3-(aq) + 2 Na+(aq) + 2 I-(aq) -> Pb2+(aq) + 2 I-(aq) + 2 Na+(aq) + 2 NO3-(aq)C) Pb2+(aq) + 2 NO3-(aq) + 2 Na+(aq) + 2 I-(aq) -> PbI2(s) + 2 Na+(aq) + 2 NO3-(aq)D) Pb2+(aq) + 2 I-(aq) -> PbI2(s)

Q: What is the molar concentration of sulfate ions in a 0.150 M Na2SO4 solution? A) 0.075 M B) 0.150 M C) 0.300 M D) 0.450 M

Q: What is the molar concentration of sodium ions in a 0.350 M Na3PO4 solution? A) 0.117 M B) 0.350 M C) 1.05 M D) 1.40 M

Q: In a solution prepared by mixing CH3OH with H2O the major species present are A) CH3OH and H2O B) CH3OH, H+, and OH- C) CH3+, OH-, and H2O D) CH3O-, H+, and H2O

Q: Water (H2O), methyl alcohol (CH3OH), ethyl alcohol (CH3CH2OH), ethylene glycol (HOCH2CH2OH), and sucrose (C12H22O11) are commonly classified as A) bases. B) nonelectrolytes. C) strong electrolytes. D) weak electrolytes.

Q: Acetic acid (CH3CO2H), formic acid (HCO2H), hydrofluoric acid (HF), ammonia (NH3), and methylamine (CH3NH2) are commonly classified as A) acids. B) nonelectrolytes. C) strong electrolytes. D) weak electrolytes.

Q: HBr, HCl, HClO4, KBr, and NaCl are all classified as A) acids. B) nonelectrolytes. C) strong electrolytes. D) weak electrolytes.

Q: The combustion reaction CH4(g) + 2 O2(g) -> CO2(g) + 2 H2O(l) can be classified as a(n)A) acid-base neutralization reaction.B) double replacement reaction.C) oxidation-reduction reaction.D) precipitation reaction.

Q: The reaction C6H12O6(s) + 6 O2(g) -> 6 CO2(g) + 6 H2O(l) is best classified as a(n)A) acid-base neutralization reaction.B) double replacement reaction.C) oxidation-reduction reaction.D) precipitation reaction.

Q: The reaction Cu(s) + 2 AgNO3(aq) -> Cu(NO3)2(aq) + 2 Ag(s) is best classified as a(n)A) acid-base neutralization reaction.B) double replacement reaction.C) oxidation-reduction reaction.D) precipitation reaction.

Q: The reaction Na3PO4(aq) + 3 AgNO3(aq) -> Ag3PO4(s) + 3 NaNO3(aq) is best classified as a(n)A) acid-base neutralization reaction.B) oxidation-reduction reaction.C) precipitation reaction.D) single replacement reaction.

Q: The reaction Pb(NO3)2(aq) + K2SO4(aq) -> PbSO4(s) + 2 KNO3(aq) is best classified as a(n)A) acid-base neutralization reaction.B) oxidation-reduction reaction.C) precipitation reaction.D) single replacement reaction.

Q: The reaction 2 HNO3(aq) + Ba(OH)2(aq) -> Ba(NO3)2(aq) + 2 H2O(l) is best classified as a(n)A) acid-base neutralization reaction.B) oxidation-reduction reaction.C) precipitation reaction.D) single replacement reaction.

Q: The reaction HNO3(aq) + KOH(aq) -> KNO3(aq) + H2O(l) is best classified as a(n)A) acid-base neutralization reaction.B) oxidation-reduction reaction.C) precipitation reaction.D) single replacement reaction.

Q: In the redox reaction 2 S2O32-(aq) + I3-(aq) -> S4O62-(aq) + 3 I-(aq), if 18.75 mL of 0.2500 M Na2S2O3 is needed for complete reaction with 15.00 mL of the I3- solution, what is the molar concentration of I3-?

Q: When the equation below is balanced in basic solution using the smallest whole numbers, the coefficient in front of the OH-(aq) is ________.CN-(aq) + MnO4-(aq) ->CNO-(aq) + MnO2(s)

Q: When the equation below is balanced in acidic solution using the smallest whole numbers, the coefficient in front of the H2O(l) is ________.Fe2+(aq) + BrO3-(aq) -> Fe3+(aq) + Br-(aq)

Q: When the equation MnO4-(aq) + C2O42-(aq) -> Mn2+(aq) + CO2(g) is balanced in acidic solution using the smallest whole numbers, the coefficient in front of the CO2(g) is ________.

Q: Redox reactions occurring in acid are evident by the appearance of ________ in the balanced equation, and redox reactions occurring in base are evident by the appearance of ________ in the balanced equation.

Q: The reaction Cu(s) + 2 HCl(aq) -> CuCl2(aq) + H2(g) is predicted not to occur because Cu is ________ than H+ in the activity series.

Q: Metals that do not react with hydrochloric acid to produce hydrogen gas are found ________ H2 in the activity series.

Q: Metals that do not dissolve in non-oxidizing acids are found at the ________ of the activity series.

Q: The best oxidizing agents are found at the ________ of the activity series.

Q: In the reaction 2 MnO4-(aq) + 10 Br-(aq) + 16 H+(aq) -> 2 Mn2+(aq) +5 Br2(aq) + 8 H2O(aq) the reducing agent is ________.

Q: The substance is undergoing oxidation in the reaction below is ________.2 S2O32-(aq) + I3-(aq) -> S4O62-(aq) + 3 I-(aq)

Q: The oxidation number of chromium in Na2Cr2O7 is ________.

Q: The oxidation number of hydrogen in CaH2 is ________.

Q: The acids HNO3 and HNO2 are named ________ and ________, respectively.

Q: In the reaction CH3CO2H(aq) + Ca(OH)2(aq) -> Ca(CH3CO2)2(aq) + 2 H2O(l)the acid is ________ and the base is ________.

Q: Because it forms some H+ and OCl- ions when dissolved in water, the molecule HOCl is classified as a(n) ________.

Q: The hydrogen ion, H+, is also referred to as a ________, and a hydrated hydrogen ion, H3O+, is called a ________ ion.

Q: When NaOH(aq) is mixed with CuSO4(aq) a precipitate forms. Based on solubility guidelines the formula of the precipitate is ________.

Q: The compound K2S is predicted to be soluble based on the solubility guideline that all ________ are soluble.

Q: The balanced net ionic equation for the reaction H2SO4(aq) + 2 KOH(aq) -> K2SO4(aq) + 2 H2O(l) is ________.

Q: The balanced net ionic equation for the reaction Na2SO4(aq) + Pb(NO3)2(aq) -> PbSO4(s) + 2 NaNO3(aq) is ________.

Q: Assuming complete dissociation, the molar concentration of Cl- ions in 0.250 M CaCl2 is ________.

Q: CH3CO2H is an example of a ________ electrolyte.

Q: What are the two products of the reaction H3PO4(aq) + 3 KOH(aq) -> ?

Q: The reaction shown below is classified as a(n) ________ reaction.Pb(OH)2(s) + 2 HNO3(aq) -> Pb(NO3)2(aq) + 2 H2O(l)

Q: The reaction shown below is classified as a(n) ________ reaction.AgNO3(aq) + HCl(aq) -> AgCl(s) + HNO3(aq)

Q: Based on the balanced chemical equation shown below, determine the mass percent of Fe3+ in a 0.7450 g sample of iron ore, if 22.40 mL of a 0.1000 M stannous chloride, SnCl2(aq), solution is required to completely react with theFe3+ present in the ore sample. The chemical equation for the reaction is:2 Fe3+(aq) + Sn2+(aq) -> 2 Fe2+(aq) + Sn4+(aq).A) 5.365%B) 8.396%C) 16.79%D) 33.58%

Q: Based on the balanced chemical equation shown below, determine the molarity of a solution containing Fe2+(aq), if 40.00 mL of the Fe2+(aq) solution is required to completely react with 30.00 mL of a 0. 250 M potassium bromate, KBrO3(aq), solution. The chemical equation for the reaction is:6 Fe2+(aq) + BrO3-(aq) + 6 H+(aq) -> 6 Fe3+(aq) + Br-(aq) + 3 H2O(l).A) 0. 0312 MB) 0. 188 MC) 1.12 MD) 2.00 M

Q: What is the molarity of a potassium triiodide solution, KI3(aq), if 30.00 mL of the solution is required to completely react with 25.00 mL of a 0. 200 M thiosulfate solution, K2S2O3(aq)? The chemical equation for the reaction is:2 S2O32-(aq) + I3-(aq) -> S4O62-(aq) + 3 I-(aq).A) 0. 0833 MB) 0. 120 MC) 0. 167 MD) 0.333 M

Q: Based on the balanced chemical equation shown below, what volume of 0.250 M K2S2O3(aq), is needed to completely react with 24.88 mL of 0.125 M KI3(aq)?2 S2O32-(aq) + I3-(aq) -> S4O62-(aq) + 3 I-(aq)A) 6.22 mLB) 12.4 mLC) 24.9 mLD) 99.5 mL

Q: According to the balanced equation shown below, 4.00 mole of oxalic acid, H2C2O4, reacts with ________ moles of permanganate, MnO4-.5 H2C2O4(aq) + 2 MnO4-(aq) + 6 H+(aq) -> 10 CO2(g) + Mn2+(aq) + 8 H2O(l)A) 1.60B) 4.00C) 8.00D) 9.00

Q: Using the following portion of the activity series for oxidation half reactions, determine which combination of reactants will result in a reaction.Na(s) -> Na +(aq) + e-Cr(s) -> Cr3+(aq) + 3 e-A) Na(s) with Cr(s)B) Na(s) with Cr3+(aq)C) Na +(aq) with Cr3+(aq)D) Na +(aq) with Cr(s)

Q: What is the oxidation number change for the bromine atom in the following unbalanced reduction half reaction?Br O3- (aq) + H+(aq) -> Br-(aq) + H2O(l)A) -7B) - 6C) + 6D) + 7

Q: What is the oxidation number of the oxygen atom in Na2O2 ? A) -2 B) -1 C) +1 D) +2

Q: What is the oxidation number of the chromium atom in K2Cr2O4 ? A) -2 B) +2 C) +6 D) +7

Q: What is the oxidation number of the sulfur atom in K2SO4 ? A) -2 B) +2 C) +4 D) +6

Q: When dissolved in water, KOH behaves as A) an acid that forms K+ and OH- ions. B) an acid that forms KO- and H+ ions. C) a base that forms K+ and OH- ions. D) a base that forms KO- and H+ ions.

Q: Which of the compounds H2C2O4, Ca(OH)2, KOH, and HI, behave as bases when they are dissolved in water? A) Ca(OH)2 and KOH B) H2C2O4 and H I C) only H I D) only KOH

Q: Which of the compounds of H2C2O4, Ca(OH)2, KOH, and H I, behave as acids when they are dissolved in water? A) Ca(OH)2 and KOH B) H2C2O4 and HI C) only H I D) only KOH

Q: Which one of the following compounds behaves as an acid when dissolved in water? A) RaO B) C4H10 C) H I D) RbOH

Q: Which of the following compounds is an Arrhenius base? A) CH3OH B) CH3CO2H C) HOCl D) CsOH

Q: Which of the following compounds is an Arrhenius base? A) C6H12O6 B) HOCl C) H2SO4 D) C6H5NH2

Q: Which of the following compounds is not an Arrhenius acid? A) CH3CO2H B) C H3CH2NH2 C) HNO2 D) H2SO4

Q: What reagent could not be used to separate Br- from CO32- when added to an aqueous solution containing both? A) AgNO3 (aq) B) Ca(NO3)2 (aq) C) Cu(NO3)2 (aq) D) Fe(NO3)2(aq)

Q: What reagent could be used to separate Br- from CH3CO2- when added to an aqueous solution containing both? A) AgNO3 (aq) B) Ba(OH)2 (aq) C) CuSO4 (aq) D) NaI (aq)

Q: The mixing of which pair of reactants will result in a precipitation reaction? A) Ba(NO3)2(aq) + Na2CO3(aq) B) K2SO4(aq) + Cu(NO3)2(aq) C) NaClO4(aq) + (NH4)2S(aq) D) NH4Br(aq) + NH4I(aq)

Q: The mixing of which pair of reactants will result in a precipitation reaction? A) CsI(aq) + NaOH(aq) B) HCl(aq) + Ca(OH)2(aq) C) K2SO4(aq) + Hg2(NO3)2(aq) D) NaNO3(aq) + NH4Cl(aq)

Q: Which pair of compounds is soluble in water? A) Ag Cl and AgBr B) CoS and K2S C) NaI and Cu(NO3)2 D) NH4NO3 and BaCO3

Q: Which one of the following compounds is soluble in water? A) Cu3(PO4)2 B) CoS C) Pb(NO3)2 D) ZnCO3

Q: Which one of the following compounds is insoluble in water? A) CaCl2 B) NaNO3 C) PbCl2 D) K2CO3

Q: What is the molar concentration of sodium ions in a 0. 450 M Na3PO4 solution? A) 0. 150 M B) 0. 450 M C) 1.35 M D) 1.80 M

Q: HCl, H I, H2SO4, LiCl, and KI are all classified as A) acids. B) nonelectrolytes. C) strong electrolytes. D) weak electrolytes.

Q: Based on the positions in the periodic table of elements A, B, and C, which of the following reactions would you expect to occur?A) A2+ + B -> A + B2+B) B2+ + C -> B + C2+C) C2+ + A -> C + A2+D) None of the reactions would be expected to occur.

Q: Based on the positions in the periodic table of elements A, B, and C, which of the following reactions would you expect to occur?A) A2+ + B -> A + B2+B) B2+ + C -> B + C2+C) C + A -> C2- + A2+D) None of the reactions would be expected to occur.

Q: Which of the above graphs corresponds to titration III? A) graph (1) B) graph (2) C) graph (3) D) None of the graphs

Q: Which of the above graphs corresponds to titration II? A) graph (1) B) graph (2) C) graph (3) D) None of the graphs

Q: Which of the above graphs corresponds to titration I? A) graph (1) B) graph (2) C) graph (3) D) None of the graphs

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