Solving for K when only given balanced equation  [ENDORSED]


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Andrea_Torres
Posts: 98
Joined: Sun Sep 15, 2019 12:15 am

Solving for K when only given balanced equation

Postby Andrea_Torres » Thu Jan 09, 2020 5:19 pm

When solving for K when you don't have any values is there a reason why we use P?

Parker Smith
Posts: 102
Joined: Thu Jul 25, 2019 12:15 am

Re: Solving for K when only given balanced equation

Postby Parker Smith » Thu Jan 09, 2020 5:49 pm

Partial pressures can be calculated since we know the total pressure of the system.

Haley Dveirin 1E
Posts: 101
Joined: Sat Jul 20, 2019 12:17 am

Re: Solving for K when only given balanced equation

Postby Haley Dveirin 1E » Thu Jan 09, 2020 5:51 pm

partial pressure is used for gasses. for aqueous things you don't need partial pressure.

205150314
Posts: 106
Joined: Wed Feb 20, 2019 12:16 am

Re: Solving for K when only given balanced equation

Postby 205150314 » Thu Jan 09, 2020 10:43 pm

P is for partial pressure, usually used when the reaction only has gases and no aqueous solutions

Isha_Maniyar_Dis2E
Posts: 110
Joined: Thu Jul 11, 2019 12:16 am

Re: Solving for K when only given balanced equation  [ENDORSED]

Postby Isha_Maniyar_Dis2E » Thu Jan 09, 2020 11:01 pm

P has nothing to do with whether we have the values or not, it just indicates that we are talking about partial pressure instead of concentration. Usually, you use partial pressure when the substances in the reaction are gases (as opposed to aqueous solutions).

Hope this helped!

kausalya_1k
Posts: 50
Joined: Wed Nov 14, 2018 12:23 am

Re: Solving for K when only given balanced equation

Postby kausalya_1k » Sat Jan 11, 2020 10:35 am

The P is used to denote partial pressures. To solve for K for gases, you would use P to denote partial pressure. However, if you are asked to solve for Kc, you use the [] concentrations (as the c in Kc stands for concentration).

Jasmine Kim 1L
Posts: 71
Joined: Fri Aug 02, 2019 12:16 am

Re: Solving for K when only given balanced equation

Postby Jasmine Kim 1L » Sat Jan 11, 2020 3:59 pm

P is used to indicate that the reactants and products are gases. You will know to use P if every molecule has a (g) after them, such as Cl2(g).
If you were asked to solve K and weren't given any values, the question was probably just asking for the expression. Then, you would use the brackets [] for aqueous reactions or P for gases.


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