Help with this "find the strongest base" thingie

[Munchy]

---

Members do not see this ad.

Hi,

I am having trouble with this kida question where it asks you to find the stronest base from the choices given.

For example:
NaCl, LiF, Na2S, KBr, BF3

I am guessing Na2S is the strongest base since S has oxidation number of -2 while all the others have -1. Because of its relatively low oxidation number, it is more likely to donate electron thus the strongest base.

Is my reasoning correct or totally garbage?

 

[Shingo123]

Hi,

I am having trouble with this kida question where it asks you to find the stronest base from the choices given.

For example:
NaCl, LiF, Na2S, KBr, BF3

I am guessing Na2S is the strongest base since S has oxidation number of -2 while all the others have -1. Because of its relatively low oxidation number, it is more likely to donate electron thus the strongest base.

Is my reasoning correct or totally garbage?

Find the strongest base huh?

I am wondering if they mentioned whether it would be in aqueous solution?

Cause then you would cross those molecules with water, as such.

NaCL + H20 ---> HCL + NaOH

If my memory serves me, this is a strong acid and strong base leading to a neutral solution.

Then from observing I see that LiF, Contains the ion of a Weak Acid and a strong base.

In water it yields: LiOH, HF.
LiOH: Strong base
HF: Weak Acid

Leading to a predominance of the basic PH.

There is more to the understanding of this, when you look at equilibrium, basically the LiOH dissociates fully, and the weak doesn't.

 

[baedero1]

i think the strongest base is LiF.
F- + H2O --> HF + OH-

 

[FataL]

The strongest one would be Na2S since it can pick up 2 Hydrogens because its oxidation number is -2.