Question

so what do all acid and all bases have in common​

Answer 1

Concentration of H+ ions .............

Answer 2

all acids

1. turn blue litmus red
2. furnish H+ ions in aqueous media
3. react with bases to form salt and water

all bases

1. turn red litmus blue
2. furnish OH- ions in aqueous media
3. react with acids to form salt and water