Textbook 6D.13

[Ashley Oh 3L]

Hello,
Just confused on 6D13 and how to even approach starting this problem. I don’t understand how to rank these molecules and what their justifications are. Does anyone know if we have to memorize these molecules or is there a method to solving? Thank you.

[Katarina Povinec 1G]

No need to memorize anything! Scroll up to the start of the problems at the end of chapter 6D and you'll find the links to tables where you can search up the Ka and Kb values for the acids/bases. Use those values to find the pH by solving for x using an ICE table (write out the reaction for each acid/base assuming you are dissolving it in water, create your ice table, and then use the Ka/Kb to solve for x). If you start with an acid, find the pH by doing -log(x), and if you started with a base, find the pOH and do 14-pOH to find the pH. Compare these values and put them in order accordingly.