CHEM 12 Lecture 22: Chapter 16: Acid-Base Equilibria (Part 4/5) (03.14.18)

Can an acid and a base react to form an acid?

A. No. Acids always react with bases to form salts.

B. Yes and No. The reaction can only occur if the substances reacting are true acids and bases.

C.Yes and No. The reaction can only occur if the reactants are organic/carboxylic acids and organic bases.

D. Yes. An acid and a base can react to form an acid if the acid is a strong acid and the base is a weak base.

Indicate whether each of the following statements is correct or incorrect.
(a) Every Brønsted–Lowry acid is also a Lewis acid.
(b) Every Lewis acid is also a Brønsted–Lowry acid.
(c) Conjugate acids of weak bases produce more acidic solutions than conjugate acids of strong bases.
(d) K⁺ ion is acidic in water because it causes hydrating water molecules to become more acidic.
(e) The percent ionization of a weak acid in water increases as the concentration of acid decreases.

Strong Acids and Bases: Since strong acids/bases completely dissociate in water, the concentration of the hydrogen ions/hydroxide ions is equal to the concentration of the acid/base.

1. What is the pH of a 0.001 M HCl solution?

2. What is the pH of a 10-4M NaOH solution?

3. What is the pH of a 0.0075 M HCl solution?

4. What is the hydrogen ion concentration in a solution with a pH of 3.75?

5. What is the hydroxide ion concentration in a solution with pH 10.4?