Fall 2009 Exam 3 Practice v1 _Zumdahl Chapters 8,9,10_ no answer key

Fall 2009 Exam 3 Practice v1 _Zumdahl Chapters 8,9,10_ no answer key

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Practice Exam 3 v1 (Zumdahl Chapters 8, 9, 10) Page 1 1. Calculate the [H + ] in a solution that is 0.10 M in NaF and 0.20 in HF. ( K a = 7.2 x 10 –4 ) A) 0.20 M B) 7.0 x 10 –4 M C) 1.4 x 10 –3 M D) 3.5 x 10 –4 M E) none of these 2. You are given a solution of the weak base Novocain, Nvc. Its pH is 11.00. You add to the solution a small amount of a salt containing the conjugate acid of Novocain, NvcH + . Which statement is true? A) The pH and the pOH both increase. B) the pH and the pOH both decrease. C) The pH and the pOH remain unchanged. D) The pH increases and pOH decreases. E) The pH decreases and the pOH increases. 3. Methyl orange is an indicator with a K a of 1 x 10 –4 . Its acid form, HIn, is red, while its base form, In , is yellow. At pH 6.0, the indicator will be A) red. B) orange. C) yellow. D) blue. E) not enough information 4. Which is the correct mathematical expression for the molar solubility (s) in mol/L (S) of Fe 3 (PO 4 ) 2 ? A) 6S 2 B) 12S 3 C) 6S 5 D) 108S 5 E) 5S 6 5. Calculate the molar solubility of BaCO 3 ( K sp = 1.6 x 10 -9 ) in 0.10 M BaCl 2 solution. A) 1.6 x 10 –10 B) 4.0 x 10 –5 C) 7.4 x 10 –4 D) 0.10 E) none of these
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Practice Exam 3 v1 (Zumdahl Chapters 8, 9, 10) Page 2 6. Silver chromate, Ag 2 CrO 4 , has a K sp of 9.0 x 10 –12 . Calculate the solubility in mol/L of silver chromate. A) 1.3 x 10 –4 M B) 7.8 x 10 –5 M C) 9.5 x 10 –7 M D) 1.9 x 10 –12 M E) 9.8 x 10 –5 M 7. How many moles of Fe(OH) 2 [ K sp = 1.8 x 10 –15 ] will dissolve in one liter of water
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This note was uploaded on 11/30/2009 for the course CHEM 1101 taught by Professor Bottomley during the Fall '08 term at Georgia Institute of Technology.

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Fall 2009 Exam 3 Practice v1 _Zumdahl Chapters 8,9,10_ no answer key

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