EXERCISE 2: Calculate the pH of a 0.50 M NH3 at 25°C. At 25°C, the base dissociation constant (Kb) of ammonia (NH3 ) is 1.8 x 10-5. Step 1. Complete the ICE Table below: Hydrolysis Equation NH3(aq) + H₂O(l) NH, (aq) INITIAL 0.50 0 (Analytical molarity) CHANGE -X +X EQUILIBRIUM [NH₂] = [NH] = [OH] = Step 2. Write the equilibrium expression for the base dissociation constant, Kt Kb = Step 3. Substitute the mathematical equation containing the variable x into the equilibrium expression. Answer: Step 4 Calculate the value of [OH]. Show the complete solution. SOLUTION + OH (aq) 0 +X
EXERCISE 2: Calculate the pH of a 0.50 M NH3 at 25°C. At 25°C, the base dissociation constant (Kb) of ammonia (NH3 ) is 1.8 x 10-5. Step 1. Complete the ICE Table below: Hydrolysis Equation NH3(aq) + H₂O(l) NH, (aq) INITIAL 0.50 0 (Analytical molarity) CHANGE -X +X EQUILIBRIUM [NH₂] = [NH] = [OH] = Step 2. Write the equilibrium expression for the base dissociation constant, Kt Kb = Step 3. Substitute the mathematical equation containing the variable x into the equilibrium expression. Answer: Step 4 Calculate the value of [OH]. Show the complete solution. SOLUTION + OH (aq) 0 +X
General Chemistry - Standalone book (MindTap Course List)
11th Edition
ISBN:9781305580343
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Chapter16: Acid-base Equilibria
Section16.6: Buffers
Problem 16.6CC: The beaker on the left below represents a buffer solution of a weak acid HA and its conjugate base,...
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