Consider a strong acid-weak base titration between 0.250 M HNO3 and NH3.
a. The volume of HNO3 added at the equivalence point is 20.50 mL. Calculate the number of moles of HNO3 used in the titration.
b. Calculate the number of moles of NH3 in the flask
c. Find the concentration of NH3 in the solution, if 25.00 mL of NH3 is used in the titration.
d. What is the species present at the equivalence point?
e. Find the concentration of the salt present at the equivalence point.
f. The Kb of NH3 is 1.8 !! 10⁻⁵. What is the Ka of NH4⁺?
g. Find the concentration of H⁺ at the equivalence point.
h. Calculate the pH and pOH of the solution at equivalence point
pH =
pOH =