chhw5 - valdez (vv689) Homework #5 Holcombe (52460) This...

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valdez (vv689) – Homework #5 – Holcombe – (52460) 1 This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points OF the Following, a solution with which pH would be the most basic solution? 1. 4.0 2. 11.2 correct 3. 7.0 4. 10.2 Explanation: The higher the pH oF a solution the greater is its basicity. 002 10.0 points A solution oF CO 2 dissolved in water is 1. acidic. correct 2. precipitated. 3. neutral. 4. basic. Explanation: 003 10.0 points A solution in which the molarity oF the hy- droxide ion is larger than the molarity oF the hydronium ion is termed 1. electrolyte. 2. neutral. 3. acidic. 4. amphiprotic. 5. basic. correct Explanation: 004 10.0 points Which oF the Following is true For strong acids? 1. They are weak electrolytes. 2. Aqueous solutions oF strong acids have a high pH. 3. They are almost totally ionized or disso- ciated in aqueous solutions. correct 4. AFter they lose a proton, they give rise to strong conjugate bases. 5. They react only with weak bases. 6. They react only with strong bases. Explanation: The term ‘strong’ implies the species Fully ionizes or dissociates; it does not imply any particular pH. 005 10.0 points IF the pH oF a solution is 3, then the hydro- nium ion concentration is ? the hydroxide ion concentration. 1. the same as 2. higher than correct 3. lower than Explanation: Since pH = 3 the solution is acidic and [H 3 O + ] > [OH ]. 006 10.0 points An Arrhenius base must contain ? and dis- sociate in aqueous solutions to produce ? . 1. the hydroxide ion or hydroxyl group; hy- droxide ions correct 2. hydrogen; hydrogen ions 3. hydronium ions; a solution whose pH is less than 7.0
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valdez (vv689) – Homework #5 – Holcombe – (52460) 2 4. an unshared pair of electrons; a nonelec- trolytic solution 5. an unshared pair of electrons; an elec- trolytic solution Explanation: The Arrhenius theory of acids and bases deFnes bases as substances which in water give o± hydroxide ions. The pure substance
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This note was uploaded on 09/26/2010 for the course CH 53215 taught by Professor Mccord during the Spring '09 term at University of Texas at Austin.

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chhw5 - valdez (vv689) Homework #5 Holcombe (52460) This...

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