Chem Exam 6

Which of the following is the weakest acid? a. HCl b. HClO c. HClO2 d. HClO3 e. HClO4

b. HClO

Write the balanced formula unit equation for the reaction of dinitrogen pentoxide, N2O5, with water to form an acid. What is the sum of the coefficients in the balanced equation? (Use the smallest whole numbers possible and don't forget coefficients of one.) a. 3 b. 4 c. 6 d. 8 e. 10

b. 4

For which one of the pairs of acid and bases does CH3COOH + OH- CH3COO- + H2O represent the correct net ionic equation? a. NaOH, HBr b. CH3COOH, Ca(OH)2 c. HNO3, Mg(OH)2 d. CH3COOH, Cu(OH)2 e. CH3COOH, Cr(OH)3

b. CH3COOH, Ca(OH)2

Which response includes all of the following compounds that exhibit hydrogen bonding and no other compounds? CH4, AsH3, CH3NH2, H2Te, HF a. AsH3, H2Te b. CH3NH2, HF c. CH4, AsH3, H2Te d. AsH3, CH3NH2 e. HF, H2Te

b. CH3NH2, HF

For which of the following would permanent dipole-dipole interactions play an important role in determining physical properties in the liquid state? a. BF3 b. ClF c. BeCl2 d. F2 e. CCl4

b. ClF

According to the Lewis theory, which one of the following species would be expected to react as a Lewis base, but not as a Lewis acid? a. BF3 b. F- c. AlBr3 d. SnCl4 e. H+

b. F-

Which pair of reactants can be used in the preparation of hydrogen bromide, HBr, a volatile acid? a. H2SO4 and NaBr b. H3PO4 and NaBr c. HBrO4 and NaOH d. HBrO3 and NaOH e. NaBrO3 and H2O

b. H3PO4 and NaBr

Which one of the following compounds is not a salt? a. K2SO4 b. HClO4 c. CaCrO4 d. CoCl2 e. NaMnO4

b. HClO4

Which one of the following is a weak acid? a. H2SO4 b. HF c. HCl d. HBr e. HI

b. HF

Which statement about sulfuric acid is false? a. It is a ternary acid. b. There is one OH bond and one SH bond in the molecule. c. It is a stronger acid than sulfurous acid. d. It is the only common polyprotic acid that is a strong acid. e. Sulfuric acid is the number-one produced chemical in the United States.

b. There is one OH bond and one SH bond in the molecule.

Which of the following interactions are the strongest? a. hydrogen bonding force b. ion-ion interactions c. permanent dipole force d. dispersion force e. London force

b. ion-ion interactions

What is the conjugate base of the hydrogen sulfate ion, HSO4-? a. hydrogen sulfate (sulfuric acid), H2SO4 b. sulfate ion, SO42- c. hydronium ion, H3O+ d. hydroxide ion, OH-

b. sulfate ion, SO42-

Which statement is *not* consistent with the Arrhenius theory of acid-base reactions? a. An acid is a substance that contains hydrogen and produces H+ in aqueous solution. b. A base is a substance that contains the OH group and produces OH- in aqueous solution. c. Ammonia is classified as a base. d. Neutralization is the combination of H+ ions with OH- ions to form H2O. e. The Arrhenius theory satisfactorily explained the reactions of protonic acids with metal hydroxides.

c. Ammonia is classified as a base.

Which of the following statements is false? a. Arrhenius acids are also Brønsted-Lowry acids. b. Brønsted-Lowry acids are also Lewis acids. c. Brønsted-Lowry bases are also Arrhenius bases. d. Arrhenius bases are also Brønsted-Lowry bases. e. Brønsted-Lowry bases are also Lewis bases.

c. Brønsted-Lowry bases are also Arrhenius bases.

According to the Brønsted-Lowry theory, which of these anions is the strongest base? a. NO3- b. Cl- c. CN- d. ClO4- e. HSO4-

c. CN-

Which one of the following species could not react as a Brønsted-Lowry acid? a. HCl b. H2O c. CaO d. NH3 e. CH3COOH

c. CaO

Which pair of acids would each react with barium hydroxide and have the net ionic equation: H+ + OH- --> H2O a. HCl and HNO2 b. HBr and HF c. HCl and HNO3 d. HNO3 and H2CO3 e. HClO4 and H2SO4

c. HCl and HNO3

According to the Brønsted-Lowry theory, which of these acids would have the weakest conjugate base? a. HBrO3 b. HNO2 c. HClO4 d. HClO2 e. HF

c. HClO4

Which of the following is the strongest acid? a. NH3 b. HNO2 c. HNO3 d. H2NNH2 e. NH4+

c. HNO3

Which one of the following species could not react as a Brønsted-Lowry base? a. H2S b. PH3 c. NH3 d. CH4 e. H2O

d. CH4

Which response includes all the following compounds that are weak acids, and no strong acids? H2SO4, HNO2, H2SO3, HF, HI a. H2SO4, HI b. H2SO4, H2SO3 c. HNO2, HF d. HNO2, H2SO3, HF e. HNO2, H2SO3

d. HNO2, H2SO3, HF

Which of the following compounds will dissolve in (by reaction with) hydrochloric acid and will also dissolve in (by reaction with) an excess of 6 M NaOH solution? a. KOH b. Mg(OH)2 c. Ba(OH)2 d. Sn(OH)2 e. Sr(OH)2

d. Sn(OH)2

The boiling points of the halogens increase in the order F2 < Cl2 < Br2 < I2 due to the resulting increasing ____ interactions. a. ion-dipole b. hydrogen-bonding c. ion-ion d. dispersion forces e. permanent dipole-dipole

d. dispersion forces

For the complete neutralization reactions between the following pairs of acid and bases, which pair is an insoluble base and a weak acid that react to form an insoluble salt? a. Ca(OH)2, HNO3 b. KOH, H3PO4 c. NH3, HF d. Ba(OH)2, H2CO3 e. Pb(OH)2, H2S

e. Pb(OH)2, H2S

Based on the reactions we have studied, ammonia can be considered as ____. a. an Arrhenius base (only) b. a Lewis base (only) c. a Brønsted-Lowry base (only) d. both an Arrhenius base and a Lewis base e. both a Brønsted-Lowry base and a Lewis base

e. both a Brønsted-Lowry base and a Lewis base

Write the net ionic equation for the reaction of beryllium hydroxide with an excess of concentrated sodium hydroxide solution. The complex ion that is formed in this reaction has ____ hydroxide ions bonded to each beryllium, and the charge on the complex ion is ____. a. one, 2+ b. two, 1+ c. three, 0 d. four, 1- e. four, 2-

e. four, 2-

Write the balanced formula unit equation for the reaction of iron(II) hydroxide with hydrochloric acid. What is the sum of the coefficients? (Do not forget coefficients of one.) a. 6 b. 7 c. 8 d. 4 e. 5

a. 6

Write the balanced net ionic equation for the complete neutralization of chromium(III) hydroxide with sulfuric acid. Use H+ rather than H3O+. What is the sum of the coefficients? (Do not forget coefficients of one.) a. 8 b. 11 c. 16 d. 18 e. 22

a. 8

Which one of the following reactions can be classified as a Lewis acid-base reaction but not as a Brønsted-Lowry acid-base reaction? a. Al(OH)3(s) + OH-(aq) ---> Al(OH)4-(aq) b. NH3(g) + H2O( ) ---> NH4+(aq) + OH-(aq) c. CH3COO-(aq) + H2O( ) --> CH3COOH(aq) + OH-(aq) d. H+(g) + H-(g) ---> H2(g) e. Ca(OH)2(s) + 2HCl(g) ---> CaCl2(s) + 2H2O( )

a. Al(OH)3(s) + OH-(aq) ---> Al(OH)4-(aq)

The following acids are listed in order of decreasing acid strength in water. HI > HNO2 > CH3COOH > HClO > HCN According to Brønsted-Lowry theory, which of the following anions is the weakest base? a. I- b. NO2- c. CH3COO- d. ClO- e. CN-

a. I-

Which of these anions is the strongest base, according to the Brønsted-Lowry theory? a. hypochlorite b. chlorite c. chlorate d. perchlorate e. they are all equal in base strength

a. hypochlorite

Which one of the following statements does not describe the general properties of liquids accurately? a. Liquids have characteristic volumes that do not change greatly with changes in temperature. (Assuming that the liquid is not vaporized.) b. Liquids have characteristic volumes that do not change greatly with changes in pressure. c. Liquids diffuse only very slowly when compared to solids. d. The liquid state is highly disordered compared to the solid state. e. Liquids have high densities compared to gases.

c. Liquids diffuse only very slowly when compared to solids.

What is the strongest base that can exist in water? a. NaOH b. NH3 c. OH- d. Ba(OH)2

c. OH-

Why is HI a stronger acid than HCl? a. Because I is more electronegative than Cl. b. Because Cl is more electronegative than I. c. The bond strength of HCl is greater than the bond strength of HI. d. The bond strength of HI is greater than the bond strength of HCl. e. HI is not a stronger acid than HCl.

c. The bond strength of HCl is greater than the bond strength of HI.

The following describe properties of substances. Which one is not a property of acids? a. They have a sour taste. b. They react with metal oxides to form salts and water. c. They react with other acids to form salts and water. d. Their aqueous solutions conduct an electric current. e. They react with active metals to liberate H2.

c. They react with other acids to form salts and water.

According to the Lewis theory, a base ____. a. is a proton acceptor b. is a proton donor c. makes available a share in a pair of electrons d. is any compound that contains electron pairs e. accepts a share in a pair of electrons

c. makes available a share in a pair of electrons