Solving for K

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Helen Mejia 1I
Posts: 67
Joined: Fri Sep 28, 2018 12:24 am

Solving for K

Postby Helen Mejia 1I » Sat Jan 12, 2019 6:08 pm

When is it okay to use parathesis or brackets when solving for K? What is the difference between them?

Ariel Cheng 2I
Posts: 67
Joined: Fri Sep 28, 2018 12:29 am

Re: Solving for K

Postby Ariel Cheng 2I » Sat Jan 12, 2019 6:12 pm

We use brackets in our calculation for Kc because we are using the molarity/concentration which is denoted with brackets. I don't think its necessary to use brackets when solving for Kp because we are using partial pressure though I'm not sure.

Amar Singh
Posts: 31
Joined: Fri Sep 28, 2018 12:20 am

Re: Solving for K

Postby Amar Singh » Sat Jan 12, 2019 9:30 pm

A simple rule of thumb would be that if the equation involves gases, you use the parenthesis to denote partial pressure, and when the equation involves an aqueous solution, you use the brackets to denote molar concentration. There are exceptions to this rule (particularly the one with gases, as sometimes you need to find the Kc value instead of Kp), but you don't have to worry about that for now.

Rachel-Weisz3C
Posts: 66
Joined: Fri Sep 28, 2018 12:23 am

Re: Solving for K

Postby Rachel-Weisz3C » Sat Jan 12, 2019 10:03 pm

I think that as long as you know that the brackets represent concentration you should be good. Once you begin to solve the problem, I don't think it is necessary to differentiate between parentheses or brackets.

Lasya Gudipudi 1A
Posts: 60
Joined: Fri Sep 28, 2018 12:15 am

Re: Solving for K

Postby Lasya Gudipudi 1A » Sat Jan 12, 2019 11:27 pm

It doesn't really matter if you use parentheses or brackets when solving for K in terms of calculation. But to find Kc, you use concentrations, so it is more appropriate to use brackets to represent molarity while when finding Kp, you use partial pressure which is represented with parentheses. The final answer won't be different since it requires the same calculation.

Mariana Fuentes 1L
Posts: 21
Joined: Wed Nov 15, 2017 3:00 am

Re: Solving for K

Postby Mariana Fuentes 1L » Sun Jan 13, 2019 1:45 pm

You use parenthesis when solving/ using Kp and you use brackets when solving using Kc.

Isabelle Fontanilla 1I
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: Solving for K

Postby Isabelle Fontanilla 1I » Sun Jan 13, 2019 1:56 pm

Brackets indicate the concentration of whatever is inside the brackets. This means that you're solving for Kc.
Parenthesis just indicates groupings and multiplication. This is not conclusive in that you can be dealing with partial pressures or concentrations.

Aiden Atoori 1C
Posts: 67
Joined: Fri Sep 28, 2018 12:24 am

Re: Solving for K

Postby Aiden Atoori 1C » Sun Jan 13, 2019 3:06 pm

A go to tip is to use brackets when you are dealing with concentration.


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