Question 1. Macromolecules and Colloids (a) The table below shows positive-mode electrospray ionisation data for a protein in aqueous solution. The adjacent peaks are related to each other by the gain or loss of a trivalent cation. The molecular weight of the protein is 8360.12 Daltons and there is only one type of trication ion present in solution. Peak m/z Rel. Abundance / % 1 610.32 53 2 749.65 92 3 981.88 27 4 1446.33 18 (i) Write out the formula for the species formed during the electrospray ionisation process, assuming the protein is neutral in the absence of the trications. [2] (ii) Write the formula for m/z of two adjacent peaks in the electrospray mass spectrum. [3] (iii) Identify the trication and all four peaks in the mass spectrum