1. Given an evaporator is used to concentrate sodium hydroxide, use the attached figure to determine what temperature must be reached to cause each of the solutions to reach boiling

at atmospheric pressure (1 atm): A. a 30 wt% aqueous NaOH solution B. a 45 wt% aqueous NaOH solution C. a 60 wt% aqueous NaOH solution D. If the pressure is changed to a vacuum at 0.134 atm, where the boiling point of pure water is 125 °F,determine the boiling points for the same NaOH concentrations in A, B, and C.