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Unformatted text preview: sy3475 Homework 4 Sutcliffe (53980) 1 This printout should have 15 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points The pH of a solution can be determined by a pH meter or by 1. indicators correct 2. color 3. conductivity 4. solvents Explanation: Color indicators are quick methods of deter mining the pH of a solution. Each acidbase indicator has a distinct characteristic color in acidic solution and in basic solution. 002 10.0 points Rainwater is naturally acidic, but in which area of the US is the rain often much more acidic? 1. Central 2. Northwest 3. Northeast correct 4. Southwest Explanation: Measurements taken by the Central Ana lytical Laboratory from the mid 1970s onward indicate that the rainwater in the Northeast is consistently more acidic than in other parts of the US. 003 10.0 points When added to water, which one of the fol lowing would produce an acidic solution? 1. MgO 2. Na 3. SO 3 correct 4. NH 3 Explanation: The equations for the reactions are 2 Na + 2 H 2 O 2 NaOH + H 2 MgO + H 2 O Mg(OH) 2 NH 3 + H 2 O NH + 4 + OH SO 3 + H 2 O H 2 SO 4 004 10.0 points Put the equations A) 2 SO 2 + O 2 2 SO 3 B) SO 3 + H 2 O H 2 SO 4 C) S + O 2 SO 2 D) S + H 2 O H 2 SO E) 2 H 2 SO + 3 O 2 2 H 2 SO 4 in order to combust sulfur and convert it into acid rain. Assume that water and oxygen are present in the atmosphere. You might not need all of the equations. 1. C D B 2. C E 3. D E 4. C B A 5. C A B correct Explanation: The correct order is C: S + O 2 SO 2 A: SO 2 + O 2 SO 3 B: SO 3 + H 2 O H 2 SO 4 005 10.0 points Which of these is NOT a consequence of acid precipitation?...
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 Spring '08
 Sutcliffe
 pH

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