Determine the pH of a solution from the concentration of a salt that is dissolved in the solution. Problems are highly scaffolded.
A salt containing the conjugate base of a strong acid will form ________ solution when it dissolves in water.
A salt containing the conjugate acid of a strong base will form ________ solution when it dissolves in water.
A salt containing the conjugate base of a weak acid will form ________ solution when it dissolves in water.
A salt containing the conjugate acid of a weak base will form ________ solution when it dissolves in water.
Consider an aqueous solution of 0.217 M NaF. (NaOH is a strong base. HF is a weak acid with a Ka value of 6.30 x 10-4).
The pH of the solution will be affected by the _____ ion.
The reaction that occurs after NaF dissociates is …
Choice A: Na+(aq) + H2O(l) ⇄ NaOH(aq) + H+(aq)
Choice B: F-(aq) + H2O(l) ⇄ HF(aq) + OH-(aq)
The equilibrium constant of the above reaction is ______.
K =
Determine the equilibrium concentration of OH-. Use the ICE table.
[OH-] =
M
Determine the equilibrium concentration of HF. Use the ICE table.
[HF]
Determine the pH of the solution. Assume a temperature of 25°C.
pH =
Consider an aqueous solution of 0.470 M KNO2. (KOH is a strong base. HNO2 is a weak acid with a Ka value of 4.00 x 10-4).
The reaction that occurs after KNO2 dissociates is …
Choice A: K+(aq) + H2O(l) ⇄ KOH(aq) + H+(aq)
Choice B: NO2-(aq) + H2O(l) ⇄ HNO2(aq) + OH-(aq)
Consider an aqueous solution of 2.61 M NH4Cl. (HCl is a strong acid. NH3 is a weak base with a Kb value of 1.80 x 10-5).
The reaction that occurs after NH4Cl dissociates is …
Choice A: NH4+(aq) + H2O(l) ⇄ NH3(aq) + H3O+(aq)
Choice B: Cl-(aq) + H2O(l) ⇄ HCl(aq) + OH-(aq)
Determine the equilibrium concentration of H3O+. Use the ICE table.
[H3O+] =
Determine the equilibrium concentration of NH3. Use the ICE table.
[NH3]