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41 solutions

Ka and Kb

Q. In the laboratory, a general chemistry student measured the pH of a 0.492 M aqueous solution of morphine, C17H19O3N to be 10.764. Use the information she obtained to determine the Kb for this base.

Solved • Jul 29, 2019

Ka and Kb

Q. 14 What is the equilibrium constant expression (Ka) for HCO2H? a. [CO2H-][H3O+] b. [CO2H-][H3O+]/[HCO2H][H2O] c. [CO2H-][H3O+]/[HCO2H] d.[CO2H-]/[HCO2H] e.[HCO2H]/[CO2H-]^2[H3O+]^2

Solved • Jul 25, 2019

Ka and Kb

Q. A solution of carbon dioxide in water has a hydronium ion concentration of 2.0 x 10-6M. Determine the concentration of hydroxide ion at 25°C. (Hint: 2H2O(l) ⇌ H3O+(aq) + OH- (aq) )

Solved • Jul 19, 2019

Ka and Kb

Q. Determine the Kb for CN−. The Ka for HCN is 4.9 × 10^-10. A) 1.4 × 10^-5 B) 4.9 × 10^-14 C) 3.7 × 10^-7 D) 2.0 × 10^-5 E) 2.3 × 10^-9

Solved • Jul 15, 2019

Ka and Kb

Q. What is the pH of pure water at 40.0°C if the Kw at this temperature is 2.92 × 10^-14? A) 6.767 B) 0.465 C) 8.446 D) 7.000 E) 7.233

Solved • Jul 15, 2019

Ka and Kb

Q. In aqueous solutions at 25°C, the sum of the hydroxide ion and hydronium ion concentrations ([H3O+] + [OH-]) equals 1 x 10^-14 True or False

Solved • Jul 12, 2019

Ka and Kb

Q. Complete the acid-dissociation reaction and its Kc and Ka equations. OH- H2O H3O+ HA A- Special instructions: Put the weak acid (HA) or weak base (A-) species before the water species (H3O+ & OH-) ___(aq) + ___(l) <-> ___(aq) + ___(aq) Kc = [__][__]/[__][__] Ka = Kc [__] = [__][__]/[__]

Solved • Jul 12, 2019