Question
Asked Nov 8, 2019

What is Ka, Kb, relationship between these and Kw.

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Step 1

An acid is a substance that gives  ions in its solution whereas a basic substance gives  ions in its solution. The reaction of an acid HA with a base BOH can be written as:

Here BA stands for salt and the reaction named as neutralization reaction. Thus the reaction of an acid with a base results in the formation of salt and water. The salt is an ionic compound that is formed by the combination of the cation (B+) from base and anion (A-) from acid and forms salt BA.

НА + ВОН-
ВА+ H,О
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НА + ВОН- ВА+ H,О

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Step 2

The Bronsted-Lowry acid-base theory was purposed by Bronsted and Lowery is called Bronsted-Lowry acid-base theory. It states that acid can give H+ ions whereas a base can accept the  ion in its solution. Hence this theory is entirely based on the presence of H+ ion in the given substance.  It purposed the concept of conjugate acid-base pair. A Bronsted acid gives H+  ion to form conjugate base whereas a Bronsted base accepts ion to form its conjugate acid.

+ Н.о
HA H,0O
А
Bronsted + Bronsted
Conjugated Conjugated
Acid
base
base
acid
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+ Н.о HA H,0O А Bronsted + Bronsted Conjugated Conjugated Acid base base acid

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Step 3

The equilibrium constant for acid dissociation is denoted as Ka. It represents the ratio of the equilibrium concentration of product and reactant molecule. Similarly the equilibrium constant for base dissociatio...

[А ]Н,О"]
а
[НA]
[ОН ]В']
К,
,
[ВОН]
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[А ]Н,О"] а [НA] [ОН ]В'] К, , [ВОН]

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