Question

How would you find the pH of something that is diprotonated? (ex. 0.20M solution)

Answer 1

Deprotonated solution is that in which a proton, i.e., H+ ion is removed.

Acids are neutral when protonated and become negatively charged when deprotonated. Just contrary to this, bases are neutral when deprotonated and positively charged when protonated. As we know, pH is a measure of the concentration of hydrogen ions in an aqueous solution. Also, pKa [acid dissociation constant], is used to measure the strength of an acid- the smaller the pKa value, the stronger is the acid.

If the pH is less than pKa, the solution is too acidic. If the pH is greater than the pKa, the solution is basic. So, we can measure the pH of a deprotonated solution by measuring its pKa.