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Homework 15.23

Posted: Mon Feb 22, 2016 8:38 pm
by Sergio Alvarez 2L
For part c, when trying to find [A]t, why do you subtract the value found from the mole ratio from 0.153, the value of [A]0?

Re: Homework 15.23

Posted: Mon Feb 22, 2016 9:41 pm
by Ronald Yang 2F
Because the amount that the concentration of B increases is essentially the amount that the concentration of A decreases (since you use up A to make B). Thus, you subtract the value you find with the mole ratio from the original amount of A to figure out the amount of A after that 115 seconds pass.