pKa to Kb

[Aliya Jain 2B]

im a little confused on how to convert pKa to Kb? I think theres multiple ways, but what's the easiest way to do it?

[Nawal Dandachi 1G]

pKa + pKb = 14, so solve for pKb. After finding pKb, use pKb = -log(kb) to find Kb

[Brittney Hun 2C]

Another way to do it is to turn the pKa into Ka first. Once you turn it into ka you can use the kw (water constant) to find the kb. Set the equation to be kb=kw/ka.

[805373590]

You can go from pka to ka by taking 10 to the power of negative pka and when you found ka you can easily divide 10 to the power of negative 14 by ka to get kb

[Justin Seok 2A]

So the simplest way would be to find Pkb using the equation 14=pka+pkb. Once you find your pkb, you can use it to find kb using 10^-pkb.

[KaleenaJezycki_1I]

What makes logical sense for me is to think, pka=-log(Ka), therefore Ka=10^-pka. Then we know Kw= Ka x Kb and so you should rearrange the equation so that Kw/Ka=Kb and now you have your Kb value! Make sure you take it slow and pay close attention.

[AKhanna_3H]

pKa + pKb = pKw. Therefore pKa + pKb = 14. 14 - pKb = pKa, and 14 - pKa = pKb.

[Michelle Xie 2B]

pKa + pKb is pKw, which is 14.

[Kristina Rizo 2K]

pKa + pKb = 14, so solve for pKb. After finding pKb, use pKb = -log(kb) to find Kb

I thought by doing the -log, you would get pKb? Wouldn't you need to 10^pKb to get Kb? Or did I switch it?

[Leila_4G]

Also, I'm forgetting the concentration equation for pKb, can someone help me with that? Thanks!

[Madeline Phan 1E]

To find pka from pkb you can do 14-pka and vice versa.

[Ian Morris 3C]

14 minus the kPa will equal the pKb. Then Kb is equal 10 to the negative pKb.

[Samuel Tzeng 1B]

pKa + pKb = 14, then use pKb to solve for Kb