HW 7 - pham(dp22389 – Homework 7 – Sutcliffe –(52440...

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Unformatted text preview: pham (dp22389) – Homework 7 – Sutcliffe – (52440) 1 This print-out should have 18 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Some solid KClO 2 is added to a water solution of HClO 2 . Which of the following statements is correct? 1. pH of the solution decreases. 2. [H 3 O + ] will remain the same. 3. [OH- ] of the solution decreases. 4. pH of the solution increases. 002 10.0 points Which response identifies the statements true of buffer solutions? l) A buffer solution could consist of equal concentrations of ammonia and ammo- nium bromide. 2) A buffer solution could consist of equal concentrations of perchloric acid (HClO 4 ) and sodium perchlorate. 3) A buffer solution will change only slightly in pH upon addition of small amounts of acid or base. 4) In a buffer solution containing benzoic acid (C 6 H 5 COOH) and sodium benzoate (NaC 6 H 5 COO) the species that reacts with added hydroxide ion is the benzoate ion. 1. Another combination 2. 2, 3, 4 3. 1, 4 4. 2, 3 5. 1, 3 003 10.0 points Which of the following mixtures can produce a buffer? I) NH 3 + NaOH II) NH 3 + NH 4 Cl III) H + + OH- IV) HClO 2 + NaClO 2 V) (CH 3 ) 3 NHCl + (CH 3 ) 3 N 1. II only 2. II, IV, and V only 3. I, III, and V only 4. II, III, and IV only 5. IV only 004 10.0 points What is the pH of a solution in which the...
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This note was uploaded on 04/14/2010 for the course CH 302 taught by Professor Mccord during the Spring '09 term at University of Texas-Tyler.

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HW 7 - pham(dp22389 – Homework 7 – Sutcliffe –(52440...

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