Ka vs. Kb

[505095972]

Can someone help explain when you use Ka, Kb, or Kc? Are Ka and Kb used whenever H30+ or OH- is a product?

[Chem_Mod]

Ka and Kb are used for acid and base respectively, usually dealing with the dissociation process in water. Kc is the equalibrium concentration and is used widely used in different reactions.

[Julia Lee]

Ka times Kb= Kw = (10^-14)
pKa +pKb = 14

[lukezhang2C]

Ka and Kb are just used for acid/base dissociation, and Kc is just the equilibrium concentration.

[Philipp_V_Dis1K]

K is the letter that denotes an equilibrium reactions quotient, the c is just denoting it's a non-acid /base reaction, a for acid, b for base.

[204929947]

PKw= POH+PH
PKa+PKb=14
PKa refers to acidity acid and PKb to weak basicity base

[Xinyi Zeng 4C]

Just to add on, Ka and Kb are used for weak acids and bases only, as strong acids and bases will fully dissolve.

[Niveda_B_3I]

Ka time Kb is Kw, and pKa + pKb is 14, and also equal to pKw

[Katelyn Phan 2A]

Ka is used for acids and Kb is used for bases. You can also determine the Ka based on knowing the Kb and vice versa.

[Celine Hoh 2L]

And Kp is the pressure constant?

[MadelynNguyen1F]

Yes Kp is the equilibrium constant expressed in terms of partial pressures of gases

[chrisavalos-2L]

Ka is used when dealing with a chemical reaction that includes an acid and Kb is used when there is a chemical reaction that includes a base. Kc is the equilibrium constant of concentrations.

[lukezhang2C]

Ka is the ionisation constant, used when dealing with acids and excess protons in a solution. Kb is typically used with bases, and finding the pOH of a solution. Kc is just the relation of Ka and Kb which is Ka X Kb = 10^-14