What is the logic behind this
rate=A^2/2B, this means that A have to be increased by sqr(2)
I meant multiplied by sqrt(2)
Well, the question states:...what is percent change in the concentration of chemical A required to keep the reaction rate unchanged
so the formula according to the stem is:
if the rate is to be the same as before, the new value for A has to be sqrt(2)*A.
(A will now be sqrt(2)*A).
rate = (sqrt(2)*A)^2/2B = 2A^2/2B = A^2/B
Hope this helps!