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Draw the following mental models using the boxes on your work packet. Start with at least 3 units of each substance. Include a legend or key to indicate the meaning of each symbol you use the legend must indicate the symbol or formula, not the name, of the element or polyatomic ion). a) Solid lead (II) chloride. b) An aqueous solution of CHCIZ. c) An aqueous solution of Na3PO4 Draw the following mental models using the boxes on your work packet. Start with at least 3 units of each substance. Include a legend or key to indicate the meaning of each symbol you use the legend must indicate the symbol or formula, not the name, of the element or polyatomic ion). a) Solid lead (II) chloride. b) An aqueous solution of CHCIZ. c) An aqueous solution of Na3PO4