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Quiz 4 - Quiz 4 Tara Malone Started 6:59 PM Questions 30...

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Quiz 4 Tara Malone  Started: October 19, 2008 6:59 PM Questions: 30     1.  (Points: 4)      What is the H 3 O + concentration in 0.45 M HCN(aq)? ( K a of HCN = 4.0 × 10 -10 ) Write this question number in the answer sheet and show your work in the answer sheet. Paragraph  Insert equation    Save Answer     2.  (Points: 4)      A solution is prepared by diluting 0.16 mol HNO 3 with water to a volume of 1.5 L. What is the pH of this solution? Write this question number in the answer sheet and show your work in the answer sheet. Paragraph  Insert equation    Save Answer     3.  (Points: 4)      What is the OH - concentration in 0.51 M CH 3 CO 2 - (aq)? ( K b of CH 3 CO 2 - = 5.6 × 10 -10 ) Write this question number in the answer sheet and show your work in the answer sheet.
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Paragraph  Insert equation    Save Answer     4.  (Points: 4)      At 25 ° C, what is the H 3 O + concentration in 0.044 M NaOH(aq)? ( K w = 1.0 × 10 -14 ) Write this question number in the answer sheet and show your work in the answer sheet. Paragraph  Insert equation    Save Answer     5.  (Points: 4)      What is the pH of 0.015 M aqueous benzoic acid? ( K a of C 5 H 6 CO 2 H = 6.3 × 10 -5 ) Write this question number in the answer sheet and show your work in the answer sheet. Paragraph  Insert equation    Save Answer     6.  (Points: 4)     
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What is the pH of 9.2 × 10 -3 M aqueous cyanide ion? ( K b of CN - = 2.5 × 10 -5 ) Write this question number in the answer sheet and show your work in the answer sheet. Paragraph  Insert equation    Save Answer    
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