20. (WCSU25.[x], 8 points) You are developing a new fluoride…
20. (WCSU25., 8 points) You are developing a new fluoride-containing mouthwash. Rather than using NaF, you decide to use SnF2. This should save money since tin fluoride is cheaper and is shown to prevent cavities in a number of studies. Calculate the mass of SnF2 (MW = 156.69 g/mol) needed to prepare 500 mL of a mouthwash with a 0.01 M fluoride ion concentration? Enter the mass needed below.