Achieve Problems 9 and 10

[Maddy Barron 1L]

Hello! Can someone explain why A- is charged and HA+ is neutral? I sort of understand pH=pKA, pH>pKa, and pH<pKA, but extra clarification would help! Thank you in advance!

[506255709]

I believe that A- is charged because it has a charge while HA (it isn't HA+) does not have a charge. These are just descriptions and you just need to know which is which. More importantly, you should be able to discern which is the predominant species in the solution from the pH or pKa