How do you identify a reactant or product as acidic or basic?

Answer 1

we can find the identification of acid and base by advocate their valence electrons
if any compound have 6 or less than 6 outermost electrons than it said to be acidic
otherwise more than 7 outermost electrons are said to be basic.

Answer 2

well bases have a hydroxyl group (OH) but you could just use uiversal indicator

Answer 3

Acids donate protons and bases accept protons.

Answer 4

the oxides and cholirides of metals are bases