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checking approximation

Posted: Sun Jan 26, 2020 11:32 pm
by JustinHorriat_4f
If the K of reaction is less than 10^-3, but when you check your approximation and it is more than 5%, then does that mean you can't approximate and have to use the quadratic formula?

Re: checking approximation

Posted: Sun Jan 26, 2020 11:36 pm
by Myka G 1l
Yes, if the x value divided by the initial value comes out to be more than 5% then you have to go back and do the quadratic formula to solve.

Re: checking approximation

Posted: Sun Jan 26, 2020 11:36 pm
by vpena_1I
That is correct, though it is not very common. The initial molarity of the reactants would have to be pretty small for that to happen.

Re: checking approximation

Posted: Sun Jan 26, 2020 11:40 pm
by SimranSangha4I
Yes, if the answer comes back more than 5% you should go back and use the quadratic formula.

Re: checking approximation

Posted: Mon Jan 27, 2020 1:48 am
by Ian Morris 3C
Yes, it doesn't happen often but it is best to always check.