What is the relationship between the strengths of substances in conjugate acid-base pairs? Explain.?

Question

What is the relationship between the strengths of substances in conjugate acid-base pairs? Explain.?

Answer 1

HA -->  A- + H+

The strongER the acid, the weakER the conjugate base will be, basically if you put HA in solution, the more HA you have the weaker the acid, and if its really weak, then you will have very little A-, which means it will be a stronger base.  

Strength of acid base pairs is easier to understand when you study equilibrium.  The larger the Ka is for an acid, the smaller the Kb will be for the conjugate base.

Answer 2

A weak acid has a strong conjugate base and a strong acid has a weak conjugate base. Same is true for a base

Answer 3

They have a good relationship. Rocky at times, but they love eachother.

Answer 4

a strong acid is a strong acid because it is 100% ionized in solution .that means at equilibrium there is none of the unionized acid left

HCL----- H + +  Cl-  for example. Because it is 100% ionized you can se ethat the conjugate base does not want to accept a proton and go back to the unionized form..so Cl-1 is a very weak base.  

Conversely  water ionizes very poorly H2O ---- H+  + OH-1

because the Ka is 10^-14. Therfore most of the water will be NON_ionized..this means that OH-1 wants to accept a proton to form the acid water and thus is a strong base. You can determine relative strengths of acids and thus their conjugate bases by looking at the Kas..since strong acids like H2SO4, HNO3 , HClO4, HCL, HBr, etc have Kas approaching infinity

then their bases are VERY VERY weak.

methane as an acid   CH4---- H+ + CH3-1 has a Ka of ~10^-44 so compared to water it is 10^30 times WEAKER so CH3-1 as a base is theoretically 10^30 times stronger than OH-1..