pKa

[305561744]

Can someone please explain to me how to interpret pKa and what this tells about an acid/base reaction as well as the charge?

[Mari Masunaga 1G]

Hi. Ka is the dissociation constant for an acid. It measures how fully an acid dissociates in solutions. The larger Ka is the more completely it dissociates and the stronger an acid it is. PKa is the negative log of Ka, and so the lower the PKa value the more acidic an acid is. Hope this helps!

[Gavin Trent 2F]

The larger the Ka, the stronger the acid. The larger the pKa, the weaker the acid. Vice-versa for bases.

[905756606]

Hi! Stronger acids = LOW pH = HIGH Ka = LOW pKA. Hope this helps!

[Lynne Xu 3K]

Ka is the equilibrium constant of an acid/base reaction. Basically, it is the concentration of the products divided by the concentration of the reactants.

Stronger acids dissociate more, so they will have more products than reactants and a higher Ka value.

pKa is the -log(Ka), so stronger acids will have a smaller pKa value.

[Joseph Lee]

With pKa, it's similar to pH in the sense of its trends. The lower the pH and pKa, the stronger the acid and higher the [H3O+] for pH and higher the [Ka] for pKa.

[Maxwell Yao]

Ka is the Acid dissociation constant and pKa is just the -log(Ka). In terms of how these relate to an acid, the higher the Ka or the lower the pKa, the stronger the acid.

In terms of how pKa of acids relates to figuring out whether or not an acid will remain neutral or will become charged in a solution of some pH we have the following rules:

If pH < pKa of acid: solution is more acidic than acid, so acid remains protonated (neutral) as H—A
If pH > pKa of acid: solution is more alkaline, and the acid will give off H+ to form A- and is negatively charged


Hope this helps.

[Erin Chin 1L]

Ka is the dissociation constant for an acid and measures the strength of an acid, and pKa is -log(Ka). The smaller the pKa is, the stronger the acid, and a larger pKa would indicate a weaker acid. If the pH is less than the pKa of a molecule, then the acid tends to be protonated and the solution will be more acidic. Similarly, if the pH is greater than the pKa, the solution is more basic because the acid tends to be deprotonated.

[Matthew Nguyen 3G]

Ka = the dissociation constant for an acid. The large the KA the stronger the acid. PKa = -log10(Ka) or the negative log of Ka so the lower the PKa the more acidic the acid.

[tristenleem3B]

Ka is the dissociation constant. Strong acids have a low pH and high Ka, meaning they also have a low pKa.

[Marleena]

As already stated, the larger the Ka (and the smaller the pKa) the stronger the acid. Looking over the equation for pKa in lecture helped me understand this concept more as well.

[Nick Oscarson 1K]

pKa essentially refers to the pH level that a chemical compound will accept or donate a proton and thus helps with determining the strength of an acid. pKa and strength of acid are inversely related meaning that when pKa is a high value, the acid will be weak; vice versa.

Here's a video that goes into more detail! https://www.youtube.com/watch?v=IQ6gHQAg_Nk

[205819952]

The larger the Ka, the stronger the acid.

[Aryan Gajjar 3D]

The pKa value is one way of determining an acid's strength. The negative log of the acid dissociation constant, often known as the Ka value, is pKa. A stronger acid has a lower pKa value. The lower the number, the more completely the acid dissociates in water.

[RJ Lopez 2l]

PKA is the -logka. The higher the KA, the lower the pKA. The KA is also the acid dissociation constant that is used to distinguish strong acids from weak acids. Strong acids will have low pKA values, usually an acid of 1 or below is a strong acid

[August Blum Dis 3D]

Ka is the dissociation constant for acids. It is essential equal to products over reactants in an acid-base reaction. Since an acid will want to create more products than reactants, a higher Ka means an acid is better at dissociating, and thus stronger. pKa is the negative log of Ka, and thus a lower pKa means a stronger acid.

[Sonia Virk 2A]

pKa is the -log of Ka and Ka is the acid dissociation constant. The lower the pKa, the stronger the acid and higher the concentration of H+. Hope this helps!

[Lawrence Javelo Disc 3B]

pKa is the -log(kA). This means that the lower the value, the more acidic it is. You can think of it as somewhat directly proportional to pH.

[105778693]

Ka is the dissociation constant for an acid while pKa is the -log (Ka). The larger Ka is the more completely it dissociates and the stronger an acid it is and therefore a lower pH.

[Nicole Ton 3C]

pKa is the negative log of Ka since p means to take the negative log of something. When interpreting this for acids and bases, the smaller the pKa value is, the stronger the acid. This is because strong acids have high values of Ka, which mathematically results in a smaller pKa value when you take the negative log of it.

[Nataly Antonova 1B]

The larger is the value of pKa, the weaker is acid; the smaller the value of pKa, the stronger the acid. Think of it the same as of pH scale, smaller pH- more acidic, larger pH- less acidic

[905740390]

The pKa can tell us if it is a strong acid or weak. A lower pKa value gives us a strong acid.

[Yewon Jang 3K]

A large Ka indicates a strong acid and a large pKa indicates a weak acid. As a result, the opposite is true: a small Ka indicates a weak acid and a small pKa indicates a strong acid

[tashyavakil 2K]

a larger pka indicates a weaker acid

[Rachel Bartley 2B]

pKa is the -log(kA), and a low Ka indicates a high ph. So a low pKa means the Ka is high, making the pH low. A high pKa means the Ka is low, making the pH high.

[Zoe Dhalla 3I]

The pKa value is one method used to indicate the strength of an acid. pKa is the negative log of the acid dissociation constant or Ka value. A lower pKa value indicates a stronger acid. That is, the lower value indicates the acid more fully dissociates in water

[Omeed Kalan]

pKa and Ka are inversely related. The larger Ka the stronger the acid and the smaller the pKa the stronger the acid.

[Polo Morales 3C]

Ka and pKa have an inverse relationship. A low pKa indicates a strong acid, while a low Ka indicates a weaker acid. Hope this helps!

[Arshaun Faraji 2H]

larger Ka is a stronger acid and larger pka is a weaker acid.
the bases work the opposite way, larger pka is stronger and larger ka is weaker

[Abigail Tran 14a]

for a weak acid, when pka<OH --> the acid is charged, when pka>OH --> the acid is neutral

[Serena Sahota 1A]

To answer your question, a large Ka will show a strong acid and a large pKa shows a weak acid. Bases would also be vise versa

[Mehreen_Suzaan_1A]

Can someone please explain to me how to interpret pKa

when pKa is larger the acid is weaker