QUESTION 21 Refer to the following information given below: The molecular-level diagrams below represent six solutions of different acids, with the water molecules omitted for clarity. Solutions 5 and 6 are twice the volume of Solutions 1 to 4. Acid lonization + HO HA + Note: H2O molecules omitted from diagrams below for clarity A- H3O* twice the volume solution 5 solution 6 solution 1 solution 2 O lo O Oo o O O o O O solution 3 solution 4 O 0 Oo O O o o 0 Total amount of acid HA + A- 9 8 8 1- 1 + 4 4- 4 + 14 5 9- 9 + 12 7 5 - 5+ HA A- H30 6 3 3- 3 + 50 5- 5+ Which of the following solutions (1) contains the weakest acid and (ii) has the lowest pH? Solution containing the weakest acid Solution 1 Solution with the lowest pH Solution 5 B Solution 4 Solution 5 Solution 4 Solution 1 D Solution 5 Solution 1