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The conjugate base of NH3 is NH4OH(aq).

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In the reaction, HClO3 + N2H4 In the reaction, HClO<sub>3</sub> + N<sub>2</sub>H<sub>4</sub> ClO<sub>3</sub><sup>-</sup> + N<sub>2</sub>H<sub>5</sub><sup>+</sup>, which two species are bases? A) HClO<sub>3</sub>, N<sub>2</sub>H<sub>4</sub> B) HClO<sub>3</sub>, ClO<sub>3</sub><sup>-</sup> C) HClO<sub>3</sub>, N<sub>2</sub>H<sub>5</sub><sup>+</sup> D) N<sub>2</sub>H<sub>4</sub>, N<sub>2</sub>H<sub>5</sub><sup>+</sup> E) ClO<sub>3</sub><sup>-</sup>, N<sub>2</sub>H<sub>4</sub> ClO3- + N2H5+, which two species are bases?


A) HClO3, N2H4
B) HClO3, ClO3-
C) HClO3, N2H5+
D) N2H4, N2H5+
E) ClO3-, N2H4

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Given that X is the same atom for each of the following, which is the strongest oxoacid?


A) Given that X is the same atom for each of the following, which is the strongest oxoacid? A) B) C) D) E)
B) Given that X is the same atom for each of the following, which is the strongest oxoacid? A) B) C) D) E)
C) Given that X is the same atom for each of the following, which is the strongest oxoacid? A) B) C) D) E)
D) Given that X is the same atom for each of the following, which is the strongest oxoacid? A) B) C) D) E)
E) Given that X is the same atom for each of the following, which is the strongest oxoacid? A) B) C) D) E)

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Three oxoacids with the formulas shown are listed in order of decreasing acid strength:HZO3 > HYO3 > HXO3What is the formula for the strongest conjugate base of these acids?

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The strongest base that can exist in aqueous solution is ________.

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In the reaction, H2PO4- + HAsO42- In the reaction, H<sub>2</sub>PO<sub>4</sub><sup>-</sup> + HAsO<sub>4</sub><sup>2</sup><sup>-</sup><sup> </sup> HPO<sub>4</sub><sup>2</sup><sup>-</sup> + H<sub>2</sub>AsO<sub>4</sub><sup>-</sup>, which species are a conjugate acid-base pair? A) H<sub>2</sub>PO<sub>4</sub><sup>-</sup>, HAsO<sub>4</sub><sup>2</sup><sup>-</sup> B) H<sub>2</sub>PO<sub>4</sub><sup>-</sup>, H<sub>2</sub>AsO<sub>4</sub><sup>-</sup> C) H<sub>2</sub>PO<sub>4</sub><sup>-</sup>, HPO<sub>4</sub><sup>2</sup><sup>-</sup> D) HAsO<sub>4</sub><sup>2</sup><sup>-</sup>, HPO<sub>4</sub><sup>2</sup><sup>-</sup> E) HPO<sub>4</sub><sup>2</sup><sup>-</sup>, H<sub>2</sub>AsO<sub>4</sub><sup>-</sup> HPO42- + H2AsO4-, which species are a conjugate acid-base pair?


A) H2PO4-, HAsO42-
B) H2PO4-, H2AsO4-
C) H2PO4-, HPO42-
D) HAsO42-, HPO42-
E) HPO42-, H2AsO4-

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Given the following substances in order of increasing acid strength,HOCl(aq) < HC2H3O2(aq) < HC2O4-(aq) < HOCN(aq) < HNO2(aq) < HCl(aq) Which species listed below is the weakest base of that set?


A) C2H3O2-(aq)
B) OCl-(aq)
C) HC2O4-(aq)
D) HNO2(aq)
E) OCN-(aq)

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Which process for making ceramics, sol-gel or sintering, results in a more uniform and stronger ceramic material?

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The F- ion can react with BF3, forming the BF4- anion. In this reaction,


A) the F- ion is a Brønsted-Lowry base, accepting a proton from the BF3 molecule.
B) the F- ion is a Lewis base, donating a proton to the BF3 molecule.
C) the F- ion is a Brønsted-Lowry acid, donating a proton to the BF3 molecule.
D) the BF3 molecule acts as a Lewis acid, accepting an electron pair from the F- ion to form a coordinate covalent bond.
E) the BF3 molecule acts as a Lewis base, donating an electron pair to the F- ion to form a coordinate covalent bond.

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In the reaction, H2PO4- + HAsO42- In the reaction, H<sub>2</sub>PO<sub>4</sub><sup>-</sup> + HAsO<sub>4</sub><sup>2</sup><sup>-</sup> HPO<sub>4</sub><sup>2</sup><sup>-</sup> + H<sub>2</sub>AsO<sub>4</sub><sup>-</sup>, which two species are acids? A) H<sub>2</sub>PO<sub>4</sub><sup>-</sup>, HAsO<sub>4</sub><sup>2</sup><sup>-</sup> B) H<sub>2</sub>PO<sub>4</sub><sup>-</sup>, H<sub>2</sub>AsO<sub>4</sub><sup>-</sup> C) H<sub>2</sub>PO<sub>4</sub><sup>-</sup>, HPO<sub>4</sub><sup>2</sup><sup>-</sup> D) HAsO<sub>4</sub><sup>2</sup><sup>-</sup>, HPO<sub>4</sub><sup>2</sup><sup>-</sup> E) HPO<sub>4</sub><sup>2</sup><sup>-</sup>, H<sub>2</sub>AsO<sub>4</sub><sup>-</sup> HPO42- + H2AsO4-, which two species are acids?


A) H2PO4-, HAsO42-
B) H2PO4-, H2AsO4-
C) H2PO4-, HPO42-
D) HAsO42-, HPO42-
E) HPO42-, H2AsO4-

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Which one of the two species, H2Se or H3As, is the stronger Brønsted-Lowry acid?

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Five solutions were prepared by dissolving 0.00100 mole of each of the following in enough water to make 1.000 liter of solution. Which one of these compounds would make the most acidic solution?


A) CO2
B) P4O6
C) P4O10
D) SO2
E) SO3

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Arrange the acids H2Se, H2Te, and H2S in order of increasing acid strength.

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Which pair of reactants will yield H2SO3 as one of its products?


A) SO2 + OH-
B) SO3 + OH-
C) SO2 + H2O
D) SO42- + OH-
E) SO3 + H2O

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The conjugate acid of HPO42- is


A) H2PO4.
B) H3PO4.
C) PO43-.
D) PO42-.
E) H2PO4-.

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Most ceramics have high melting points and are brittle .

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Which 0.1 M solution would be the most acidic?


A) Al(NO3) 3 (aq)
B) Ca(NO3) 2 (aq)
C) KNO3 (aq)
D) Mg(NO3) 2 (aq)
E) Zn(NO3) 2 (aq)

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For the system NH2OH + CH3NH3+ For the system NH<sub>2</sub>OH + CH<sub>3</sub>NH<sub>3</sub><sup>+</sup> CH<sub>3</sub>NH<sub>2</sub> + NH<sub>3</sub>OH<sup>+</sup> the position of the equilibrium lies to the left. Which is the strongest acid in the system? A) NH<sub>2</sub>OH B) CH<sub>3</sub>NH<sub>3</sub><sup>+</sup> C) CH<sub>3</sub>NH<sub>2</sub> D) NH<sub>3</sub>OH<sup>+</sup> E) NH<sub>2</sub>OH and CH<sub>3</sub>NH<sub>3</sub><sup>+</sup> are equal in acid strength, and are the strongest acids in the system. CH3NH2 + NH3OH+ the position of the equilibrium lies to the left. Which is the strongest acid in the system?


A) NH2OH
B) CH3NH3+
C) CH3NH2
D) NH3OH+
E) NH2OH and CH3NH3+ are equal in acid strength, and are the strongest acids in the system.

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For the system NH2OH(aq)+ CH3NH3+(aq) For the system NH<sub>2</sub>OH(aq)+ CH<sub>3</sub>NH<sub>3</sub><sup>+</sup>(aq) CH<sub>3</sub>NH<sub>2</sub>(aq)+ NH<sub>3</sub>OH<sup>+</sup>(aq)the position of the equilibrium lies to the left. What is the strongest acid in this reaction? CH3NH2(aq)+ NH3OH+(aq)the position of the equilibrium lies to the left. What is the strongest acid in this reaction?

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In the reaction, HClO3 + N2H4 In the reaction, HClO<sub>3</sub> + N<sub>2</sub>H<sub>4</sub> ClO<sub>3</sub><sup>-</sup> + N<sub>2</sub>H<sub>5</sub><sup>+</sup>, which two species are acids? A) HClO<sub>3</sub>, N<sub>2</sub>H<sub>4</sub> B) HClO<sub>3</sub>, ClO<sub>3</sub><sup>-</sup> C) HClO<sub>3</sub>, N<sub>2</sub>H<sub>5</sub><sup>+</sup> D) N<sub>2</sub>H<sub>4</sub>, N<sub>2</sub>H<sub>5</sub><sup>+</sup> E) ClO<sub>3</sub><sup>-</sup>, N<sub>2</sub>H<sub>5</sub><sup>+</sup> ClO3- + N2H5+, which two species are acids?


A) HClO3, N2H4
B) HClO3, ClO3-
C) HClO3, N2H5+
D) N2H4, N2H5+
E) ClO3-, N2H5+

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