9) 9) Which of the following acids will have the strongest conjugate base? A) HC

Question

9) 9) Which of the following acids will have the strongest conjugate base? A) HCI B) HCIO4 C) HCN D) HNO3 E) HI 10) Identify the weak diprotic acid. 10) A) H3PO4 11) Identify the triprotic acid. A) HCIO4 D) H3PO4 E) HNO3 12) Which of the following is true? 12) A) A neutral solution does not contain any H30+ or OH- B) A neutral solution contains (H20]-[H3O'1 C) A basic solution does not contain H30* D) An acidic solution has [H3O1 (OH E) None of the above are true. 13) What is the Kw of pure water at 50.0°C, if the pH is 6.6302 13) A) 5.50 x 10-14 B) 213 10-14 C) 1.00 10-14 D) 2.34 10-7 E) There is not enough information to calculate the Kw. 4) Calculate the concentration of or in a solution that contains 39 10-4 M H30, at 25C Identify the solution as acidic, basic or neutral. 14) A) 3.9 10-4 M, neutral B)27×10-2 M, basic C) 2.6 × 10-11 M, acidic D) 2.7 10-2 M, acidic E) 26 10-11 M, basic 15) Calculate the pOH of a solution that contains 3.9 C) 10.59 10-4 M H3o* at 25°C. A) 3.31 B) 459 15) D) 0.59 E) 9.14 16) Calculate the pH of a solution that contains 2.4·10-5 M H30, at 25 A) 462 B) 240 C) 9.38 16) D) 4.17 E) 11.60 17) Determine the pH of a 0023 M HNO3 solution. A) 1.64 B) 2.49 C) 12.36 D) 2.30 17) E) 3.68 18) Calculate the hydroxide ion concentration in an aqueous solution with a pHof 433 at 25C A) 6.3 10-6 M B)4.7 × 10-5 M C)3.8 10-5 M D) 2.1 10-10 M E)9.7 10-10M

Explanation / Answer

9. strongest conjugate base is obtained from weak acid by removal of H+.So HCN can form strong conjugate base.

10. weak diprotic acid is H2SO3

11. triprotic acid is H3PO4

12. an acidic solution has [H3O+] > [OH-]

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