1. A company must make the decision between using Haifa technology (HCl) and Dorr technology (H₂SO4) to build a new phosphoric acid plant. It has access to an extensive source of by-product hydrochloric acid at $50 tonne (100% basis). (5 marks)

a. Assuming quantitative reactions in both cases and no solvent losses, at what price would sulphuric acid be required for the company to be in break-even raw material cost position?

b. If the company was able to obtain $30 per tonne for calcium chloride and was not able to sell the gypsum, what would the break-even price for sulphuric acid in this case?