Help please. Question about which is strongest base
Chemistry discussion, revision, exam and homework help.
-
- Reputation:
- Thread Starter
- New Member
- Posts: 3
Re: Help please. Question about which is strongest baseHere is the ques that I tried to cut/paste as a picture in above post
34. Consider the following equilibria.
HNO2 + BrO- <--> HBrO + NO2- Keq = 2.4 x 105
H2SiO3 + Br0- <--> HBrO + HSiO3- keq = 9.5 x 10-2
HIO4 + NO2 <--> HNO2 + IO4 Keq = 45
The strongest base is:
A. HSiO3 B. N02 C. BrO D. I04 -
- Reputation:
- Community Assistant
- TSR Idol
- Location: here and there
- Posts: 9,614
Re: Help please. Question about which is strongest baseIn each of the equations the species that gains a hydrogen ion is behaving as a Bronsted Lowry base.(Original post by hydronium)
Here is the ques that I tried to cut/paste as a picture in above post
34. Consider the following equilibria.
HNO2 + BrO- <--> HBrO + NO2- Keq = 2.4 x 105
H2SiO3 + Br0- <--> HBrO + HSiO3- keq = 9.5 x 10-2
HIO4 + NO2 <--> HNO2 + IO4 Keq = 45
The strongest base is:
A. HSiO3 B. N02 C. BrO D. I04
The larger the equilibrium constant the more the equilibrium lies to the RHS and the stronger the base.
However, then you have to take into account the relative strengths of the acids involved.
In equation 1, the equilibrium lies well to the RHS which means that BrO- can remove a hydrogen ion from HNO2 but NO2 cannot remove a hydrogen ion from HBrO. Hence BrO- is a stronger base than NO2.
Apply similar logic to the oter equations.
