General Chemistry 1 Part 2. Stoichiometry in Aqueous Solution Water as a polar substance is a good solvent for polar and ionic compounds. A lot of laboratory work in chemistry involves chemical reactions that occur in aqueous solution. In order to understand solution stoichiometry it is imperative that you are very comfortable doing basic molarity and dilution calculations. In this workshop you will begin with some basic calculations and then we will end with a challenging stoichiometry problem. A. Molarity calculations Consider a solution in which 9.7 g of barium nitrate are dissolved in 570 mL of water. a) What is the molarity of the solution? b) How many moles of nitrate ions are there in the solution? c) How many total moles of ions are there in the solution? d) Dilution: You need to prepare 0.10L of 0.050M solution of barium nitrate from the initial solution (9.7 g of barium nitrate dissolved in 570 mL of water). Discuss with your group and write down the step-by-step procedure to prepare the solution. Please include all necessary calculations.

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