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Ka constant

Posted: Sat Nov 30, 2019 10:20 am
by Ami_Pant_4G
What does the Ka equilibrium constant represent and what is it used for? Thanks in advance.

Re: Ka constant

Posted: Sat Nov 30, 2019 10:31 am
by Sarah Zhari 1D
Ka is the equilibrium constant for acids. It's used to determine the level of dissociation an acid in an aqueous solution at equilibrium by finding the ratio between the products and reactants. Because of this, a higher Ka will indicate a stronger acid, as it dissociates more. Inversely, a lower pKa indicates a stronger acid.

Re: Ka constant

Posted: Sat Nov 30, 2019 1:50 pm
by erica thompson 4I
Ka is the equilibrium constant for a weak acid

Re: Ka constant

Posted: Sat Nov 30, 2019 1:56 pm
by EthanPham_1G
Ka is an equilibrium constant for acids. It is equal to Ka=[A-][H+]/[AH]
(concentration of the products divided by the concentration of the reactants).

Lavelle mentioned that only weak acids would have an equilibrium constant. This is because if it were a strong acid, it would dissociate completely into its products, with none of the reactants present.

Re: Ka constant

Posted: Sat Nov 30, 2019 3:13 pm
by RasikaObla_4I
The Ka equilibrium constant represents the strength of an acid in a solution based on how well it can dissociate. Lavelle mentioned that if a Ka value is given, it usually indicates that the element is a weak acid because a strong acid that dissociates completely would have a Ka of close to 1.

Re: Ka constant

Posted: Sun Dec 01, 2019 7:13 pm
by Claire Stoecklein 1E
The Ka constant tells you how strong an acid is, if it is a very small number that means only part of it dissociates into hydronium.