A laboratory technician prepares two separate 0.10 M aqueous solutions
CHEMISTRY · Multi-part · A Level · Chemistry · Acids and bases · Acids and bases
Problem
A laboratory technician prepares two separate 0.10 M aqueous solutions, one containing benzoic acid, C6H5COOH(aq), and the other containing sodium ethanoate, CH3COONa(aq). Equal volumes of the two solutions are mixed in a beaker of water held at 25 °C.
Answer the following related to the proton-transfer process that occurs immediately after mixing.
(a) Identify the Brønsted–Lowry acid and the Brønsted–Lowry base present at the instant the two solutions first come into contact.
(b) Write the balanced overall molecular equation for the proton-transfer reaction that occurs in the aqueous medium.
(c) Convert the molecular equation from part (b) into a balanced net-ionic equation.
(d) Clearly label each conjugate acid–base pair in the net-ionic equation from part (c), and briefly explain (2–3 sentences) how the equation illustrates the Brønsted–Lowry definition.