University of Texas, Arlington CHEM 1442 Chapter 15 Questions 1)PH = 3

University of Texas, Arlington

CHEM 1442

Chapter 15 Questions

1)PH = 3.4,H⁺ =_______________________(3.98 X 10^-4)

                             2.               OH^- = 1.2 X 10^-6, pH =                          (8.08)

pH of Strong Acids and Bases

                             3.               What is the pH of a 0.08 M HBr solution? (1.1)

                             4.               What is the pH of a 0.05 M Ca(OH)₂ solution? (13)

pH of Weak acids and Bases

                             5.               What is the pH of a 0.5 M HOCl solution? Ka = 3.5 X 10^-8 (3.88)

                             6.     What is the pH of a 0.3 M C₆H₅NH₂ solution? Kb = 4.2 X 10^-10 (9.05)

                             7.               A 0.1 M HX solution is 3% ionized. What is the value of Ka? (9.28 X 10^-5)

                             8.               A 0.10 M HX solution has a pH of 2. What is the Ka? (1.1 X 10^-3)

Salt Solutions

                             9.           What is the pH of a 0.10 M NaF solution? Ka HF = 7.2 X 10^-4 (8.1)

                             10.             What is the pH of a 0.10 M NH₄Cl solution? Kb NH₃ = 1.8 X 10^-5 (5.1)

                             11.             Which salt solution would result in an acidic solution: KCl, CaF₂, or FeCl₃? (FeCl₃)

pH of Salt Solutions

12. Will solutions of the following be acidic, basic, or neutral? (a) NaCl
    1. 2. KNO₂ (c) CuNO₃ (d) AgNO₃