Work sheet -1- 1. Calculate the concentration of hydrogen ion and hydroxide ion at 25°C in a) 0.15 M HNO3 b) 0.010 M Ca(OH)2 I 2. A student prepared a 0.1 M acetic acid solution and measured its pH to be 2.88. Calculate a) Ka for acetic acid and b) the percent dissociation of acetic acid. Solution: CH3COOH (aq) + H2O -> CH3COO (aq) +H30 (1) (aq) 3. The pH of human arterial blood is 7.40. What is its hydrogen ion concentration? 4. Calculate the pH and pOH of an aqueous solution that is a 0.035 M in HCl b) 0.045 M in HBr c) 0.020 M in Ba(OH)2 5. A sample of orange juice was found to have a pH of 3.80. What were the molar Hand OH concentrations in the juice? 6. Calculate the concentration of H and OH in pure water at 25°C. 7. Silver chloride is a typical slightly soluble substance. At 25°C its solubility (x) is 1.88 X 10-3 g/L Calculate its Ksp i W PS