Inverse Kc [ENDORSED]

[705512695]

Hello? When do we know we have to use the inverse of Kc or any K?

[Tatyana Bonnet 2H]

Hi! You use the inverse of K when you are looking for the K value of the reverse reaction.
For example:
If you have A--> C+B, and lets say the K value is 3 (this will be the "original" reaction you are looking at)
The reverse reaction C+B--->A will have a K value that is the inverse of the "original" or un-reversed reaction. In this case the K value for the reverse reaction will be 1/3. Hope this helps!

[Eliot Kagan 2G]

You will typically use the inverse Kc when solving for the reverse equation.
For example in the reaction 2SO3 = 2SO2 +O2.
kc will equal ([SO2]^2[02])/[SO3]^2
The inverse kc will equal [SO3]^2/([SO2]^2[02])

[ellenulitsky Dis 1I]

How I like to think about it is that if it is aA+bB<---->cC+dD then it is Kc, if it is cC+dD<---->aA+bB then it is 1/Kc (this is the inverse). Hope this helps!

[Massimo_Capozza_1G]

so the inverse is just reactants over products?

[Chudi Onyedika 3A]

You would use it when you want the Kc of the reverse reaction.

[Ryan Agcaoili 2E]

To state, the inverse of Kc is basically the reciprocal of Kc.

[David Y]

Inverse of K is used for when finding the reverse reaction.

[jasmineculilap_3F]

You want to use the inverse of Kc when solving for the Kc of the reverse reaction.

[Justin Zhang_1A]

You'll use the inverse of Kc when you're finding the reverse reaction.

[jasonfarrales3D]

Hi! We would use the inverse value of K for a reaction when we are trying to find the K value of its reverse reaction.

[Zainab Jamali 1H]

inverse of Kc is to the reverse reaction what Kc is to the forward reaction. that's how I remember it!

[Crystal Pan 2G]

Kc is the equilibrium constant, so we use it to describe the forward reaction. When we are describing the reverse reaction(when products are making the reactants), we will use 1/Kc to describe the equilibrium constant. Another two to remember are when we multiply the moles of the entire reaction by two, we will square the equilibrium constant, and when we divide the moles of the entire reaction by two, we will square root the equilibrium constant.

[Charisma Arreola 2F]

The inverse is used when you have a reaction with the correct compounds but the reactant or product is on the wrong side.

[Melanie Lin 3E]

Hi! You use inverse Kc (1/Kc) when you want to find the equilibrium constant of the reverse reaction.

[Abhinav Behl 3G]

We would need to find the inverse of Kc (1/Kc) whenever we are asked to find the equilibrium constant of the reverse reaction.

[Jared Limqueco 3E]

So you should be using the inverse for a reverse reaction!

[JasmineCap1A]

so the inverse is just reactants over products?

To answer your question, yes inverse is reactants over products :)

[Jerry_T]

Inverse K_c is for the reverse reaction where it's reactants over products.

[Ellison Gonzales 1H]

Would inverse also be when in some problem solutions they make the products a -x and the reactants a +x in the “change” section of an ICE table? I thought it was almost always that products are positive and reactants are negative but I’ve seen it done both ways now

[t_rasul2I]

we inverse kc when we are flipping the reaction or in other words using the reverse reaction. A + B -> C w a k of 2 would have a k of 1/2 if the reaction was flipped and C -> A + B

[kristinalaudis3e]

if it goes fro A+B--> C then it would be K but if it goes from C-->A+B then it would be 1/K

[Geethika Janga 1L]

You simply us reverse Kc or 1/Kc when you are switching from a forward to a reverse reaction. If you want to look at it a different way, we use the reciprocal of Kc with the reverse reaction because the [products] become the [reactants] and visa versa.

[Susan Chamling 1F]

The inverse K provided the K value of the reverse reaction, but can also be helpful when solving a question that requires combining or manipulating several reactions.

[Karen Zheng_2K]

Inverse of Kc would just be used for the reverse reaction, so products --> reactants!

[emwoodc]

The inverse Kc is for the inverse reaction ! :)

[Taylor K 2D]

You use the invert of Kc when using the reverse reaction, and you use Kc^n when multiplying the entire equation by the same coefficient.

[Chris 1C]

Since K is for the forward reaction, we use 1/K for the reverse reaction.

[Kiyoka Kim 3C]

This website https://courses.lumenlearning.com/suny- ... th%20power. has some good explanations!

[Andy Hon 3E]

Kc is used in the forward reaction and Kc^-1 is used in the inverse reaction.

[Brianna Chen 3F]

If you flip an equation, you need to take the inverse of the K value.

[Joel Meza 3I]

You use the inverse of the K value when you want to find the K value of the reverse reaction. So if you are given K for A+B-->C and you want the K for C-->A+B then you take the inverse of the first K.

[Emma Strassner 1J]

You would use the inverse when you are dealing with the reverse reaction.

[Isabella Cortes 2H]

you would use inverse K when you are using the reverse reaction

[Presley Gao 2C]

We have to use the inverse of Kc or any K when we are considering the reverse reaction.

[Javier Perez M 1H]

Remember that in reverse, so do your moles of products and reactants flip.

[Mansi Solanki 3A]

You would use the inverse of Kc when you are looking at the reverse reaction taking place since now the reactants would be in the numerator and the products would be in the denominator.

[Sam Wentzel 1F 14B]

Use the inverse for the reverse reaction!

[Daniel Hernandez 1G]

You would use the inverse of Kc when you are asked to find the equilibrium of the reverse reaction.

[LovepreetSran_3H]

You would use it when you want the Kc of the reverse reaction

[Mehreen 3I]

You would only use the inverse of K when you want to find the Kc of the reverse reaction.

[MariaCassol1L]

You use 1/Kc when you are looking at the Kc of a reverse reaction. So for example, if they give you Kc=3 for 2C+O2--->2CO @ a given temperature, then 2CO---> 2C+O2 will have a Kc=1/3 at that same temperature.