1) How many H+ ions can the acid CH3CO2H donate per molecule? Select one: A. 1 B

Question

1)

How many H+ ions can the acid CH3CO2H donate per molecule?

Select one:

A. 1

B. 4

C. 3

D. 2

2)

The reaction HNO3(aq) + KOH(aq) KNO3(aq) + H2O(l) is best classified as a(n)

Select one:

A. acid-base neutralization reaction.

B. oxidation-reduction reaction.

C. precipitation reaction.

D. single replacement reaction.

3)

a balanced net ionic equation for the reaction of CdCl2(aq) with Na2S(aq).

Select one:

A. Cd2+(aq) + 2 Cl-(aq) + 2 Na+(aq) + S2-(aq) CdS(s) + 2 Na+(aq)

B. Cd2+(aq) + 2 Cl-(aq) + 2 Na+(aq) + S2-(aq) CdS(s) + 2 NaCl(aq)

C. CdCl2(aq) + Na2S(aq) CdS (aq) + 2 NaCl(aq)

D. Cd2+(aq) + S2-(aq) CdS(s)

4)

What is the oxidation half reaction in the chemical reaction
Cr2O72-(aq) + 6 Cl-(aq) + 14 H+(aq) 2 Cr3+(aq) + 3 Cl2(aq) + 7 H2O(l)?

Select one:

A. 2 Cl-(aq) Cl2(aq) + 2e-

B. Cr2O72-(aq) + 14 H+(aq) + 6e- 2 Cr3+(aq) + 7 H2O(l)

C. Cr2O72-(aq) + 14 H+(aq) 2 Cr3+(aq) + 7 H2O(l) + 6e-

D. Cl2(aq) + 2e- 2 Cl-(aq)

5)

The following pictures represent aqueous solutions of three acids HA (A = X, Y, or Z), with water molecules omitted for clarity. Unshaded spheres represent hydrogen atoms or ions and gray spheres represent A atoms or ions. Which of the three is the strongest acid, and which is the weakest?

Select one:

A. HY is the strongest acid and HX is the weakest acid.

B. HZ is the strongest acid and HY is the weakest acid.

C. HX is the strongest acid and HY is the weakest acid.

D. HY is the strongest acid and HZ is the weakest acid.

6)

Which one of the following compounds is soluble in water?

Select one:

A. Cu3(PO4)2

B. ZnCO3

C. Pb(NO3)2

D. CoS

7)

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-

Select one:

A. Na+(aq) with Cr(s)

B. Na(s) with Cr(s)

C. Na(s) with Cr3+(aq)

D. Na+(aq) with Cr3+(aq)

8)

Based on the balanced chemical equation shown below, determine the mass percent of Fe3+ in a 0.6450 gram sample of iron ore, if 22.40 mL of a 0.1000 M stannous chloride, SnCl2(aq), solution is required to completely react with the Fe3+ present in the ore sample. The chemical equation for the reaction is
2 Fe3+(aq) + Sn2+(aq) 2 Fe2+(aq) + Sn4+(aq)

Select one:

A. 19.40%

B. 6.196%

C. 38.79%

D. 9.697%

9)

The mixing of which pair of reactants will result in a precipitation reaction?

Select one:

A. K2SO4(aq) + Cu(NO3)2(aq)

B. Ba(NO3)2(aq) + Na2CO3(aq)

C. NaClO4(aq) + (NH4)2S(aq)

D. NH4Br(aq) + NH4I(aq)

Explanation / Answer

1) A

2) A

3) D

4) A

6) C

7) C

9) A

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