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4) Which one of the following statements is TRUE? A) A buffer is an aqueous solution composed of two weak acids. B) A buffer can absorb an unlimited amount of acid or base. C) A buffer resists pH change by neutralizing added acids and bases. D) A buffer does not change pH when strong acid or base is added. E) None of the above are true. 5) When titrating a monoprotic strong acid with a weak base at 25°C, the (HINT: Give this some thought, because it's a different combination than we usually looked at.) A) pH will be 7 at the equivalence point. B) pH will be greater than 7 at the equivalence point. C) titration will require more moles of the base than acid to reach the equivalence point. D) titration will require more moles of acid than base to reach the equivalence point. E) pH will be less than 7 at the equivalence point. 6) Which of the following compounds will have the highest molar solubility in A) PbSO4, Ksp = 1.82 × 10-8 B) MgCO3, Ksp = 6.82 × 10-6 C) Agl, Ksp = 8.51 × 10-17 D) PbS, Ksp = 9.04 × 10-29 E) FeS, Ksp = 3.72 × 10-19 pure water?

4) Which one of the following statements is TRUE? A) A buffer is an aqueous solution composed of two weak acids. B) A buffer can absorb an unlimited amount of acid or base. C) A buffer resists pH change by neutralizing added acids and bases. D) A buffer does not change pH when strong acid or base is added. E) None of the above are true. 5) When titrating a monoprotic strong acid with a weak base at 25°C, the (HINT: Give this some thought, because it's a different combination than we usually looked at.) A) pH will be 7 at the equivalence point. B) pH will be greater than 7 at the equivalence point. C) titration will require more moles of the base than acid to reach the equivalence point. D) titration will require more moles of acid than base to reach the equivalence point. E) pH will be less than 7 at the equivalence point. 6) Which of the following compounds will have the highest molar solubility in A) PbSO4, Ksp = 1.82 × 10-8 B) MgCO3, Ksp = 6.82 × 10-6 C) Agl, Ksp = 8.51 × 10-17 D) PbS, Ksp = 9.04 × 10-29 E) FeS, Ksp = 3.72 × 10-19 pure water?

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter15: Acid–base Equilibria
Section: Chapter Questions
Problem 51P
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4) Which one of the following statements is TRUE? A) A buffer is an aqueous solution composed of two weak acids. B) A buffer can absorb an unlimited amount of acid or base. C) A buffer resists pH change by neutralizing added acids and bases. D) A buffer does not change pH when strong acid or base is added. E) None of the above are true. 5) When titrating a monoprotic strong acid with a weak base at 25°C, the (HINT: Give this some thought, because it's a different combination than we usually looked at.) A) pH will be 7 at the equivalence point. B) pH will be greater than 7 at the equivalence point. C) titration will require more moles of the base than acid to reach the equivalence point. D) titration will require more moles of acid than base to reach the equivalence point. E) pH will be less than 7 at the equivalence point. 6) Which of the following compounds will have the highest molar solubility in pure water? A) PbSO4, Ksp = 1.82 × 10-8 B) MgCO3, Ksp = 6.82 × 10-6 C) Agl, Ksp = 8.51 × 10-17 D) PbS, Ksp = 9.04 × 10-29 E) FeS, Ksp = 3.72 × 10-19 7) In which of the following solutions would solid PbBr2 be expected to be the least soluble at 25°C? A) 0.1 MH Br B)0,1 M NaBr C) 0.1 M CaBr2 D) 0.1 M K NO3
Transcribed Image Text:4) Which one of the following statements is TRUE? A) A buffer is an aqueous solution composed of two weak acids. B) A buffer can absorb an unlimited amount of acid or base. C) A buffer resists pH change by neutralizing added acids and bases. D) A buffer does not change pH when strong acid or base is added. E) None of the above are true. 5) When titrating a monoprotic strong acid with a weak base at 25°C, the (HINT: Give this some thought, because it's a different combination than we usually looked at.) A) pH will be 7 at the equivalence point. B) pH will be greater than 7 at the equivalence point. C) titration will require more moles of the base than acid to reach the equivalence point. D) titration will require more moles of acid than base to reach the equivalence point. E) pH will be less than 7 at the equivalence point. 6) Which of the following compounds will have the highest molar solubility in pure water? A) PbSO4, Ksp = 1.82 × 10-8 B) MgCO3, Ksp = 6.82 × 10-6 C) Agl, Ksp = 8.51 × 10-17 D) PbS, Ksp = 9.04 × 10-29 E) FeS, Ksp = 3.72 × 10-19 7) In which of the following solutions would solid PbBr2 be expected to be the least soluble at 25°C? A) 0.1 MH Br B)0,1 M NaBr C) 0.1 M CaBr2 D) 0.1 M K NO3
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