Q1: What is the pH of a 0.20 mol/L solution of hydrocyanic acid? Q2:
Q2: The pH of an acid solution is 2.77. The concentration of the acid is 0.25 mol/L. What is the Ka of the acid?Q3:
Q3: What is the Kb of the cyanide ion (answer to 2 S.D)?
Q4: What is the pH of a 0.50 mol/L solution of sodium cyanide?
Q5: The pH of a 0.40 mol/L solution of a weak base is 8.76. What is the Kb of the base?
Q6: 1.5 g of sodium ethanoate is dissolved to make 300 mL of solution. What is the pH of the solution?