A solution containing equal molar amounts of NH and NH Cl at 25 °C receives a few…
CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A solution containing equal molar amounts of NH3 and NH4Cl at 25 °C receives a few drops of 0.10 M NaOH, and the volume change is negligible. Which statement best describes the resulting pH change?
(a) The pH remains exactly the same because buffers completely prevent any pH change.
(b) The pH increases slightly because the added OH− is largely neutralized.
(c) The pH increases dramatically because the OH− remains unreacted in solution.
(d) The pH decreases slightly because the added OH− converts NH3 to NH4+.