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A

Posted: Sun Mar 08, 2020 9:26 pm
by 205150314
is A the initial concentration or given concentrations when plugging them into equations? or is it not even concentrations?

Re: A

Posted: Sun Mar 08, 2020 9:29 pm
by 205007651
A represents the reactant molar concentration. If its [a]0 then it's the initial concentration.

Re: A

Posted: Sun Mar 08, 2020 9:37 pm
by Ashley Alvarado 2C
[A] is the concentration of the reactants and [A]0 is the initial concentration.

Re: A

Posted: Sun Mar 08, 2020 9:51 pm
by rabiasumar2E
[A]0 represents the initial concentration and [A] represents the concentration of the reactants!

Re: A

Posted: Sun Mar 08, 2020 9:55 pm
by Frank He 4G
Also note if you were ever confused that A naught is how we refer to [A]0, and that the little 0 symbol, or naught, does often mean the initial or starting point when it is in the lower position (whereas it would usually mean under standard conditions if it were in the upper position).

Re: A

Posted: Sun Mar 08, 2020 9:58 pm
by Cole Woulbroun 1J
In the Arrhenius equation, A does not represent concentrations. Instead, it is a reaction-based constant that describes the spatial requirements for the reaction to occur. If k is large, meaning that the reaction rate will be large, then A will also be large. A large A tells us that the spatial requirements for the reaction to occur are not demanding, whereas a small A tells us that they are.

Re: A

Posted: Sun Mar 08, 2020 10:02 pm
by Brandon Valafar
A represents the concentration of the reactants and A0 represents the initial concentration.

Re: A

Posted: Sun Mar 08, 2020 10:26 pm
by kristi le 2F
Also, A varies by reaction but is mostly independent of temperature.

Re: A

Posted: Sun Mar 08, 2020 10:26 pm
by Niharika 1H
A is the concentration, while A0 is the initial concentration.