destroyer vs. kaplan in acid base

[joonkimdds]

---

Members do not see this ad.

destroyer 39 says KBr is neutral because both of them are spectator ions.
pH=7

in Kaplan, it says KBr is same as Br- and this is conjugate base of strong acid and thus weak base.
I don't know its pH but weak base sounds like around pH=8.

which method should I follow?



another example from destroyer is NaBr. Destroyer separated it into Na and Br, combined Na with OH, Br with H resulting in strong base and strong acid and pH = 7.

If this was on Kaplan, I am sure they would say NaBr is same as Br- which is conjugate base of strong acid and thus weak base.

 

[ckmonster]

NaBr came from NaOH (strong base) and HBr (strong acid) then it is a neutral salt! all the other options come from the combination of strong/weak acid/base!

hope that helps!

 

[sixkiller]

The term "weak" base is not generally used for group 7 anions...

Most inorganic chemistry texts describe such ions as being feebly basic.

Likewise, group 1 cations are described as being feebly acidic...

You can think of the two as more or less off setting one another.