He table below lists some acids and bases. strong acids weak acids weak bases strong bases hbr ch3cooh nh3 naoh hno3 hcooh nh4oh koh h2so4 ca(oh)2 which salt has a ph < 7? a) kbr b) hcook c) caso4 d) nh4no3

Amongst the given list of acids and bases, following are the strong acids and weak acids

Strong Acid: HBr, and

Weak Acid: and HCOOH

And strong bases with weak bases are given below;

Strong Base: NaOH, KOH and

Weak Base: and

Now, Acid  + Base    →    Salt   + Water

so, the salt of strong acid and weak base which will have pH < 7

will be

because of the following acid base reaction (neutralization reaction)

    +         ↔        +