A student places 25.0 mL of 0.150 M nitric acid, HNO₃(aq)
CHEMISTRY · Multi-part · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A student places 25.0 mL of 0.150 M nitric acid, HNO₃(aq), into an Erlenmeyer flask in preparation for a titration with sodium hydroxide. No titrant has been added yet.
(a) Calculate the initial concentration of hydronium ions, [H₃O⁺], in the flask.
(b) Determine the initial pH of the solution, reporting your answer to two decimal places.
(c) Justify why it is reasonable to ignore the auto-ionization of water when performing the calculation in part (b).