CHAPTER 18:Ionic Equilibria: Acids and Bases

What is K_w formula?

K_w=[H₃O⁺][OH^-]=1.0×10^-14

The pH and pOH formula:

pH + pOH= 14.00

Ph in a neutral solutions:

ph= 7

Ph in a basic solutions:

pH>7 and pOH<7 aka ph is is greater than 7

Ph in a acidic solutions:

pH<7 and pOH>7 aka ph is is less than 7

How does K_a relate to K_b?

Kw= K_a x K_b

Dilute aqueous solutions of salts that contain no free acid or base come in four types:

1. Salts of Strong Bases and Strong Acids

2. Salts of Strong Bases and Weak Acids

3. Salts of Weak Bases and Strong Acids

4. Salts of Weak Bases and Weak Acids

basic solutions

Salts made from strong soluble bases and weak acids hydrolyze to form

neutral aqueous solutions

Salts made from strong acids and strong soluble bases form

acidic aqueous solutions

Salts made from weak bases and strong acids form

Aqueous solutions of salts of strong acids and strong bases are

neutral

Aqueous solutions of salts of strong bases
and weak acids are

basic

Aqueous solutions of salts of weak bases
and strong acids are

acidic

Aqueous solutions of salts of weak bases
and weak acids can be

neutral, basic or acidic

What are the concentrations of H₃O⁺ and OH^- in pure water at 25°C?

Both ions have a concentration of 1.0 ×10^-7M