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5% rule
Posted: Sun Jan 19, 2020 11:38 pm
by Abigail Menchaca_1H
What is this rule telling us?
Re: 5% rule
Posted: Sun Jan 19, 2020 11:41 pm
by Tracy Tolentino_2E
If the change value, x, divided over the initial concentration is less than 5% of that initial, it's safe to assume that the change was negligible. This is to affirm that when we have a quadratic equation, we don't have to do the quadratic formula to solve for x.
Re: 5% rule
Posted: Sun Jan 19, 2020 11:47 pm
by Jared_Yuge
Its basically there to save us time so we dont have to use the quadratic formula, plus we can assume the change to the concentration to the reactant is nonexistent which is nice as well. You can always just do the problems with the quadratic formula and it will still be correct if you ever forget the 5% rule