Strong Acids vs Weak Acids

[abbydouglas1K]

How can you tell which is which? I know that string acids apparently pronate in water but how can you tell by just looking at them ?

[KatelinTanjuaquio 1L]

The properties that make an acid strong are weak are the following:

1. Weaker (longer) A-H bond makes it easier to remove H+.
2. Oxoacids more readily lose H+ if resulting anion is stabilized by electron withdrawing atoms which delocalize and stabilized the negative charge.(Delocalized charge makes anions more stable.)

[MadisonB]

These are some common strong acids:
HCl - hydrochloric acid
HNO3 - nitric acid
H2SO4 - sulfuric acid (HSO4- is a weak acid)
HBr - hydrobromic acid
HI - hydroiodic acid
HClO4 - perchloric acid
HClO3 - chloric acid

@https://www.thoughtco.com/list-of-strong-and-weak-acids-603642

You can also differentiate a strong versus weak acid using pKa and Ka values. High pKa--> weak acid (more acidic), High Ka values--> strong acid (better disassociation)