Question

5)

People with severe contact dermatitis may have some concern over the nickel content Stainless steel utensils. Suppose you knew that the % Ni in a steel sample was approximately 10.00%. If you wanted to ensure that you produced 5.00 gramot precipitate, how many grams of steel would you suggest as a sample? Gwen Ni reacts with a precipitating agent called DMG in a 1:2 stoichiometry to form NI(DMG)2. The Molar mass of Ni = 58.69 g/mol; the molar mass of NI(DMG)2 = 288.91 g/mol Solution: Department

Answer 1

Amount of wi in the sg precipitate molar mass of ni -x59 molar mass of Nicomal = 58.69 g more 288.91 g mot =x5g Amount of ni in the precipitate. = 1.0157 g Criven that percentage of Ni in the steel is 10%. iie 10 x weight of steel = 1.01579 100 weight of Steel = 10157 X100 10 = 10.1579 10.157g of steel need to be taken as sample.