midterm 3 2005

midterm 3 2005 - 510.101 Third Exam Name_ 1. Define the...

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510.101 Third Exam Name_____________________ 1. Define the following pairs of terms. One sentence covering both, or two short phrases, are OK. Please read the terms carefully! (eight items, 5 points each, 40 points total) a. ΔG and ΔG 0 b. K eq and K a c. acid and base d. strong acid and weak acid e. electrical potential and the Nernst equation f. reducing agent and reduction g. oxidation state and oxidation h. cathode and anode
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2. Short answers, 4 items, 5 points each, 20 points in all. Give one-sentence reasons for your answers. a. Which is the stronger acid: formic acid (HC(O)OH) or phenol (C 6 H 5 OH)? C 6 H 5 refers to a benzene ring. b. Which is the stronger acid: hydrogen cyanide (HCN) or hydrofluoric acid (HF)? c. Which is more easily oxidized: calcium metal or copper metal? d. Which is a better solvent for an electrolyte: water or hexane (C 6 H 14 )?
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3. (4 items, 5 points each, 20 points total) The ammonium ion (NH 4 +) has a pK a of about 9. (a) What is the pH of an aqueous solution of 10 M ammonium chloride
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This note was uploaded on 09/29/2009 for the course ME 530.230 taught by Professor Katz during the Spring '09 term at Johns Hopkins.

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midterm 3 2005 - 510.101 Third Exam Name_ 1. Define the...

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