chem hw5 - rose (kmr2427) Homework 5 fakhreddine (51615)...

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rose (kmr2427) – Homework 5 – fakhreddine – (51615) 1 This print-out should have 33 questions. Multiple-choice questions may continue on the next column or page – Fnd all choices before answering. 001 1.0 points Which is NOT a conjugate acid-base pair? 1. H 3 SO + 4 : H 2 SO 4 2. H 2 O : OH 3. H 2 SO 4 : SO 2 4 4. HCl : Cl 5. H 2 : H 002 1.0 points In the reversible reaction HSO 3 + H 2 O SO 3 2 + H 3 O + , what two substances act as acids in the Bronsted-Lowry sense? 1. HSO 3 and H 2 O 2. some other pair 3. HSO 3 and H 3 O + 4. H 3 O + and H 2 O 5. SO 2 3 and H 3 O + 003 1.0 points In the series HClO, HClO 2 , HClO 3 , HClO 4 , which is the strongest acid? 1. HClO 4 2. HClO 3 3. HClO 2 4. HClO 004 1.0 points Sulfuric acid is a stronger acid that sulfurous acid because 1. the e±ective electronegativity of sulfur in sulfuric acid is less. 2. sulfuric acid has more ionizable hydro- gens. 3. sulfuric acid is a strong acid and sulfurous acid is a weak acid. 4. the e±ective electronegativity of sulfur in sulfuric acid, (due to the withdrawing e±ect on the sulfur atom by the additional oxygen atom) is greater. 5. acid strength for ternary acids increases across a period. 005 1.0 points Which of the following anions is the strongest base, according to the Bronsted-Lowry the- ory? 1. None of the anions listed is a base. 2. NO 3 3. Cl 4. ² 5. ClO 3 6. I 006 1.0 points ²or a given weak acid HA the value of K a 1. changes if we add a strong acid to a solution of the weak acid. 2. changes with the pH of the solution. 3. None of these 4. cannot be greater than 10 7 . 5. does not change with temperature.
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rose (kmr2427) – Homework 5 – fakhreddine – (51615) 2 6. cannot be less than 10 7 . 7. changes if we add a strong base to a solution of the weak acid. 007 1.0 points Given the following p K a values, rank the conjugate bases in order of increasing strength. I)
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This note was uploaded on 03/03/2011 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas at Austin.

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chem hw5 - rose (kmr2427) Homework 5 fakhreddine (51615)...

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