strong acid/base?

[Nicole Jacobs 1C]

How can you tell it is a strong acid or strong base just by looking at the molecular formula?

[Chem_Mod]

Yes, from the MF you can infer the lewis structure, and from the lewis structure you can infer the stability of the bonds involving H and see if there are lone pairs on atoms. The less stable the molecule the more readily it behaves as an Acid or Base (given it can give/accept lone pairs/H+s). Consequently the stronger conjugate A or B, the stronger the corresponding B or A (less stable).

[Kalsuda Lapborisuth 1B]

Another way to identify strong acid is to see the difference in electronegativity. If there is more difference in electronegativity, it will weaken the bond and make the acid stronger.

[Alejandro Salazar 1D]

Strong Bases are determined by the first two groups of elements(Alkali and Alkaline Earth Metals) paired with hydroxide ions (OH-)