Lecture 142/19/06. Strong Bases: What is the pH of 0.01 M solution of each of the strong bases? NaOH CaO.

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Lecture 142/19/06

Strong Bases: What is the pH of 0.01 M solution of each of the strong bases? NaOH CaO

Weak acids and bases HA + H 2 O ↔ H 3 O + + A - HF + H 2 O ↔ H 3 O + + F - K a = A - + H 2 O ↔ HA + OH - F - + H 2 O ↔ HF + OH - NH 3 + H 2 O ↔ NH OH - K b =

Fig. 16-1, p.770

CH 3 COOH (aq) + H 2 O (l) ↔ CH 3 COO - (aq) + H 3 O + (aq) K a = 1.8 x CH 3 COO - (aq) + H 2 O (l) ↔ CH 3 COOH (aq) + OH - (aq) K b = 5.6 x H 2 O (l) ↔ OH - (aq) + H 3 O + (aq) K w = K a K b

What is the pH of a 0.05 M solution of benzoic acid ( C 6 H 5 COOH)? K a = 6.3 x at 25°C