pKa Values of Various Compounds

Flashcards covering the pKa values of various compounds discussed in the lecture.

pKa

A measure of the strength of an acid; the lower the pKa value, the stronger the acid.

H-X (X=Cl, Br, I)

Hydrogen halides with pKa values ranging from -7 to -10, indicating they are strong acids.

H3O+

Hydronium ion, with a pKa value of -1.74, representing a strong acid.

HNO3

Nitric acid, with a pKa value of -1.3, indicating it is a strong acid.

HF

Hydrofluoric acid, with a pKa value of 3.2, which is a weak acid compared to strong acids.

H2O

Water, with a pKa value of 15.7, acting as a very weak acid.

NH3

Ammonia, with a pKa of 36, representing a very weak base in its conjugate acid form.

H2

Dihydrogen (hydrogen gas), with a pKa of 35, indicating it is not acidic.

Acid strength

Determined by pKa values; lower values indicate stronger acids.