Weak acids with higher pH

[Alison Le 2E]

Hi everyone! Can someone explain why solutions of weak acids have higher pH values than solutions of strong acids at the same concentration? (This is a question from the outline! I didn't understand how to answer it though.) Thanks!

[Autessa Anoosheh 3E]

I believe this is because a strong acid is completely deprotonated which means there is a higher proton concentration in the solution, and the higher the proton concentration, the lower the pH.

[Rose Arcallana 2B]

Conceptually pH values are from 0 to 14. Acids are usually 0-7, and bases are 7-14. That being said as the pH number goes up the less acidic it is. It would only make sense for weaker acids to be higher in the pH scale as they do not deprotonate as well as strong acids. In other words, weak acids are not able to let go of their H+ as much as strong acids, thus fewer H+ concentrations in the reaction and higher pH.