18. A solution is prepared by taking 10mL of 40% pure CH3COOH with a density of 1.058g/mL and completing it to 100mL with distilled water. What is the pH of this solution? H:1,C:12, O:16)(CH3COOHKa=1.8105) a) 0.15 b) 2.45 c) 4.89 d) 2.94 e) 11.55