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57. Formic acid is used in the venom of some species of ants. What is the pH of a 0.2 M solution of formic acid (K₁ = 1.78 × 10 M? A) 8.90 B) 4.45 C) 3.75 D) 2.2 Ionization of Water, Weak Acids, and Weak Bases2 E) 1.72

57. Formic acid is used in the venom of some species of ants. What is the pH of a 0.2 M solution of formic acid (K₁ = 1.78 × 10 M? A) 8.90 B) 4.45 C) 3.75 D) 2.2 Ionization of Water, Weak Acids, and Weak Bases2 E) 1.72

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57. Formic acid is used in the venom of some species of ants. What is the pH of a 0.2 M solution of formic acid (K₁ = 1.78 × 10 M? A) 8.90 B) 4.45 C) 3.75 D) 2.2 Ionization of Water, Weak Acids, and Weak Bases2 E) 1.72 58. List the acids in INCREASING order of strength (weakest to strongest): nitrous acid (K₁=4.0 × 10); carbonic acid (K₁ = 4.4 × 107); acetic acid (K₁ = 1.7x 105) phosphoric acid (K, 7.3 x 10) B) A) acetic acid, carbonic acid, nitrous acid, phosphoric acid carbonic acid, acetic acid, nitrous acid, phosphoric acid acetic acid, nitrous acid, carbonic acid, phosphoric acid C) D) phosphoric acid, nitrous acid, acetic acid, carbonic acid E) carbonic acid, phosphoric acid, nitrous acid, acetic acid 59. A 0.6 M solution of a weak acid had a pH of 5.8. What is the p of the solution? A) 11.3 B) 10.5 C) 8.2 D) 5.7 E) 29 60. Ibuprofen is a weak acid with a pk, of 4.9 (shown with the ionizable hydrogen with a star). It is absorbed through the stomach and the small intestine as a function of polarity-charged and very polar molecules are absorbed slowly; neutral hydrophobic molecules absorb quickly. If the stomach pH is about 1.5 and the small intestine pH is about 6, where (and why) will more ibuprofen be absorbed into the bloodstream? H₂C HC I HC CH₂ CH CH₂ A) More ibuprofen will be absorbed in the small intestine because it will be uncharged due to the pH being greater than the p B) More ibuprofen will be absorbed in the stomach because it will be uncharged due to the pH being lower than the p C) More ibuprofen will be absorbed in the small intestine because it will be charged due to the pH being greater than the pk₂. D) More ibuprofen will be absorbed in the stomach because it will be charged due to the pH being lower than the p E) Ibuprofen will be absorbed equally well in both the stomach and small intestine. 61. Which compound acts as a diprotic acid? A) CH₂COOH B) NHÃ c) H₂CO3 D) H₂PO E) CH₂CH₂OH
Transcribed Image Text:57. Formic acid is used in the venom of some species of ants. What is the pH of a 0.2 M solution of formic acid (K₁ = 1.78 × 10 M? A) 8.90 B) 4.45 C) 3.75 D) 2.2 Ionization of Water, Weak Acids, and Weak Bases2 E) 1.72 58. List the acids in INCREASING order of strength (weakest to strongest): nitrous acid (K₁=4.0 × 10); carbonic acid (K₁ = 4.4 × 107); acetic acid (K₁ = 1.7x 105) phosphoric acid (K, 7.3 x 10) B) A) acetic acid, carbonic acid, nitrous acid, phosphoric acid carbonic acid, acetic acid, nitrous acid, phosphoric acid acetic acid, nitrous acid, carbonic acid, phosphoric acid C) D) phosphoric acid, nitrous acid, acetic acid, carbonic acid E) carbonic acid, phosphoric acid, nitrous acid, acetic acid 59. A 0.6 M solution of a weak acid had a pH of 5.8. What is the p of the solution? A) 11.3 B) 10.5 C) 8.2 D) 5.7 E) 29 60. Ibuprofen is a weak acid with a pk, of 4.9 (shown with the ionizable hydrogen with a star). It is absorbed through the stomach and the small intestine as a function of polarity-charged and very polar molecules are absorbed slowly; neutral hydrophobic molecules absorb quickly. If the stomach pH is about 1.5 and the small intestine pH is about 6, where (and why) will more ibuprofen be absorbed into the bloodstream? H₂C HC I HC CH₂ CH CH₂ A) More ibuprofen will be absorbed in the small intestine because it will be uncharged due to the pH being greater than the p B) More ibuprofen will be absorbed in the stomach because it will be uncharged due to the pH being lower than the p C) More ibuprofen will be absorbed in the small intestine because it will be charged due to the pH being greater than the pk₂. D) More ibuprofen will be absorbed in the stomach because it will be charged due to the pH being lower than the p E) Ibuprofen will be absorbed equally well in both the stomach and small intestine. 61. Which compound acts as a diprotic acid? A) CH₂COOH B) NHÃ c) H₂CO3 D) H₂PO E) CH₂CH₂OH
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