Assume that our dye compound, XA, undergoes the following equilibrium in aqueous solution: XA(aq) ⇄ X+(aq) + A−(aq) (Both X+(aq) and A−(aq) are colorless) If a solution initially contains 65.4 μM XA and no X+ or A− prior to equilibrium, what are the concentrations of all three species if the equilibrium mixture gives an absorbance of 0.223 measured at a wavelength of 500.0 nm? Report answer in units of μM. (Hint: ICE and you know some equilibrium information.)

Lab reagent, hypothesis test.a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl.these six measurements are assumed to be an srs of all possible measurements from solution.they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution.carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.