638 Answered Questions for the topic AP chemistry
Calculate the pH for a buffer solution prepared by mixing 100.0mL of 0.10M HF and 200.0mL of 0.10M KF
A. 2.82
B. 2.96
C. 3.32
D. 3.44
E. 3.53
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What is the [H3O+] of a solution that is 0.0100M HNO2 Ka=4.5×10^-4 and 0.0100M in NaNO2?
A. 2.14×10^-4M
B. 7.41×10^-4M
C. 1.17×10^-4M
D. 1.45×10^-4M
E. 4.5×10M
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What is the pOH of an aqueous solution of 0.500M trimethlyline, a weak base with Ka=6.3×10^-5 with the formula (CH3)3N?
A. 9.8
B. 7
C. 4.2
D. 2.25
E. Less than 1
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How do I solve this AP Chemistry problem on Kb
In the laboratory, a general chemistry student measured the pH of a 0.599M aqueous solution of C2H5NH2 (a weak base) to be 12.192. What is Kb for this base?
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A 0.10M solution of which of the following salts is most basic?
A. NH4F
B. NH4NO2
C. NH4CH3COO
D. NH4OCl
E. NH4CN
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What reaction occurs when NH4Br dissolves in water?
A. NH4+ + OH- <==> NH4OH
B. Br-+ H3O <==> HBr+ H2O
C. NH3+H2O <==>NH4+OH
D. NH4+H2O <==> NH3+H3O+
E. Br- + H2O <==> HBr+ OH-
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How do I solve this pH problem?
1. A solution is prepared in which 1.0 mol NaNO2 and 1.5 mol HNO2 are added to a liter of aqueous solution. What is the pH of the solution?
2. Suppose 3.65 grams of HCl are added to the...
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What is NH4+ concentration of the 3.0M ammonia solution below?
Acid: HF
Conjugate base: NH3
Ka: 7.2×10^-4
pKa: 3.14
Kb: 1.8×10^-5
pKb: 4.74
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What is the pH of 3.0M aqueous solution of NH3?
NH3 information
Base: NH3
Conjugate Acid: HF
Kb: 1.8×10^-5
pKb: 4.74
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What is the pH of a 0.400M solution of HF
Information for HF
Acid: HF
Ka: 7.2×10^-4
pKa: 3.35
Conjugate Base: NH3
Kb: 1.8×10^-5
pKb: 4.74
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Compare the percent dissociation of 0.100M propanoic acid
Compare the percent dissociation of 0.100M propanoic acid
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Calculate the pH of each of the following solutions?
A. A 0.100 M propanoic acid
B. A 0.100M sodium propanoate
C. Pure H2O
D. A mixture containing 0.100M HC3H5O2 and 0.100M NaC3H5O2
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How do I identify this acid?
A 0.010M acid solution has a pH of 2.00. The acid could be
A. HNO3
B. H2SO4
C. HCOOH
D. CH3OOH
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What is the [H3O+] in a 0.025M HNO3?
A. 4.0×10^-13
B. 0.025M
C. 1.60
D. 12.40M
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Which of the following salts will be acidic?
A. KClO4
B. NH4Br
C. NaHCO3
D. Na2C2O4
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The ionization of water is endothermic. How is Kw related to the temperature of water?
A. Kw increases as temperature increases
B. Kw decreases as temperature increases
C. Kw increases as temperature decreases
D. Kw remains constant as temperature decreases
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How do I solve this AP Chemistry problem on the reaction 2H2O (l)<==>H3O+ (aq)+ OH-(aq)
Consider the following equilibrium:
2H2O (l)<==>H3O+ (aq)+ OH-(aq)
A. [H3O+] increases and pH increases
B. [H3O+] increases and pH decreases
C.[H3O+] decreases and pH...
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Which of the following factors of an acidic solution would affect its pH?
I. The strength of the acid
II. The concentration of the acid
III. The temperature
A. I and II only
B. II and III only
C. I and III only
D. I, II, and III
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How do I solve this equilibrium problem on the reaction HCO3-+H3O+<==>H2CO3+H2O
Consider the following equilibrium:
HCO3- + H3O+ <==> H2CO3+ H2O
Which of the following statements is true?
A. Products are favored because H2O is a stronger acid than...
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Which of the following solutions has the lowest electrical conductivity?
A. 1.0 M HI
B. 1.0M NaOH
C. 1.0M H2S
D. 1.0M NaNO3
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Which of the following salts will produce a solution with the highest pH?
A. 1.0M NaNO3
B. 1.0M H2SO4
C. 1.0M NaHCO3
D. 1.0M NaH2PO4
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What is the value of Oh for H2PO4-
A. 1.3×10^-12
B. 6.2×10^-8
C. 1.6×10^-7
D. 7.5×10^-3
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Which of the following is true for a neutral solution?
A. [H3O+]=0.0M
B.[H3O+]=[OH-]
C. [H3O+]>[OH-]
D. [H3O+]<[OH-]
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How do I solve this equilibrium problem?
2H2S (g)==> 2H2 (g)+S2 (g)
When heated, hydrogen sulfide has decomposes to the equation above. A 3.40 g sample of H2S (g) is introduced into an evacuated rigid 1.25L container. The sealed...
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How do I solve this AP Chemistry problem on the reaction C (s)+H2O(g)==>CO (g)+H2 (g)?
CO (g) + H2(g) <--> C(s) + H2O (g) ∆H˚ = -131 kJA rigid container holds a mixture of graphite pellets (C(s)), H2O(g), CO(g), and H2(g) at equilibrium. State whether the number of moles of CO...
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