Calculating K

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EvanWang
Posts: 101
Joined: Sat Sep 07, 2019 12:16 am

Calculating K

Postby EvanWang » Thu Jan 09, 2020 8:16 pm

In a reaction where the only substance that can be inputed into K is on the reactant side (the rest of the reactants and products are either solids or pure liquids), is K calculated as just the concentration of that substance? Or is it the inverse of the concentration?

Baoying Li 1B
Posts: 113
Joined: Sat Aug 17, 2019 12:18 am

Re: Calculating K

Postby Baoying Li 1B » Thu Jan 09, 2020 8:23 pm

I think it's one over the concentration of the substance as a reactant(neither a solid or pure liquid). This shows the equilibrium constant of the forward reaction whereas the reverse reaction will only be the concentration of the substance.

DHavo_1E
Posts: 118
Joined: Sat Aug 17, 2019 12:17 am

Re: Calculating K

Postby DHavo_1E » Thu Jan 09, 2020 8:29 pm

I agree with the statement above that K would be 1/concentration of the gas or liquid, and would like to add that this is because the activity of pure substances and liquids is 1, which accounts for the right side of the equation of solids and liquids. K = [(activities of products)^n/(activities of reactants)^n).

Tyler Angtuaco 1G
Posts: 130
Joined: Wed Sep 11, 2019 12:16 am

Re: Calculating K

Postby Tyler Angtuaco 1G » Fri Jan 10, 2020 8:57 am

Kc is always the ratio of the equilibrium concentrations of the products to the reactants, so it would just be 1/(concentration of that reactant).

805291863
Posts: 100
Joined: Sat Sep 14, 2019 12:16 am

Re: Calculating K

Postby 805291863 » Fri Jan 10, 2020 9:40 am

It would be the inverse of the concentration because the value for the products would be 1

William Francis 2E
Posts: 101
Joined: Wed Sep 18, 2019 12:20 am

Re: Calculating K

Postby William Francis 2E » Fri Jan 10, 2020 10:57 am

It would be the inverse of the one reactant concentration since Kc is always calculated with product concentrations over reactant concentrations. If no reactants' or products' can be input then you just input 1.
Last edited by William Francis 2E on Fri Jan 10, 2020 11:14 am, edited 1 time in total.

ThomasNguyen_Dis1H
Posts: 102
Joined: Fri Aug 30, 2019 12:17 am

Re: Calculating K

Postby ThomasNguyen_Dis1H » Fri Jan 10, 2020 11:12 am

It would be the inverse of the concentration since K is products over reactants


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