Kw

[Annalyn Diaz 1J]

I’ve seen that Kw=Ka*Kb, but I’ve also seen Kw=10^-14. Can someone clarify that concept for me? Thanks.

[Hovik Mike Mkryan 2I]

Hello,
Kw is representing the concentration of both the hydroxide and hydronium concentrations. Kw= 1.0 x 10^-7 multiplied with another 1.0 x 10^-7. Each 1.0 x 10^-7 represents the concentration for both hydroxide and hydronium. Therefore, kw can equal to both of the answers you stated. Hope this helped!

[Steven Garcia 1H]

Kw is simply a constant that helps when calculating the pH. Kw has a value of 1.0x10^-14.
You can also express Kw in the equation Kw=Ka*kb. This equation just goes to show that the product of the concentration of H3O+ ions (Ka) and the concentration of OH- ions (Kb) should always equal in 1.0x10^-14.

Say you know the concentration of H3O+ ions, but not the concentration of OH- ions, you can plug in the known values and solve for the concentration of OH- ions (Kb). Hope this helps!

[Pooja Sheladiya 1L]

Is Pka different from kw?