1. [OH^-] = 2.5x10^-6 M ; pH = ________________

2. [HNO₃] = 0.0035 M; pH = ________________

3. 0.354 g of NaOH is dissolved to give 2.50 L of solution. What is the normality of the solution and what is the pH of the solution?

4. 0.25 mL of 0.10 M HCl mixed with 100 mL of H₂O. What is the concentration of HCl in M and in N? What is the pH?

5. Which of the following reactions will react to the right about 100% and which will react to the right about 0%? For each give your reasoning.

a) HCl(aq) = H⁺¹(aq) + Cl^-1(aq)

b) Cl^-1(aq) + H₂O(l) = HCl(aq) + OH^-1(aq)

c) H⁺¹(aq) + Cl^-(aq) = HCl(aq)

d) Cl^-(aq) + H₂O(l) = H⁺¹(aq) + ClO^-(aq)

6. What is the pH of a 0.03 M solution of HCN (K_a = 4.8x10^-10 ).