Problem: You weigh out a piece of copper wire (AW=63.546):Weight of copper stand

Problem: You weigh out a piece of copper wire (AW=63.546):Weight of copper standard..0.2601 g Dissolve itin a slight excess of concentrated nitric acid. Add to the solutionthe required amount of concentrated ammonia. Transfer thisquantitatively to a 100 mL volumetric flask dilute to volume andmix thoroughly. 10.00 mL of this is pipetted into a 100 mLvolumetric flask the required amount of concentrated ammonia isadded and diluted to volume. This is Standard 1. Standard 2 is madeby pipetting 20 mL of the original solution into a 100 mLvolumetric flask adding the required amount of ammonia NH3 anddiluting to volume. Using the same cuvet for all measurements thefollowing %Ts were obtained at 625 nm: