The synthesis of copper hydroxyl nitrate salt was started by adding 1.91 g of Na2CO3. H2O dissolved in 25 mL of deionized H2O onto 7.01 g of Cu(NO3)2.2.5H2O dissolved in 30 mL of deionized H2O. Then the mixture was heated at 45 ◦C continuously for 30 minutes even though there were some moments of temperature fluctuation at the beginning. After the mixture cooled to room temperature, it was filtered by suction filtration. Then the resulting copper hydroxyl nitrate precipitate was transferred onto a recrystallizing dish to dry for a week. After a week, 0.2075 g of the synthesized copper hydroxyl nitrate was put into a crucible that was heated for 10 minutes and cooled down to room temperature. Next, the crucible and product were heated for an hour and cooled down to room temperature. Finally, after calculating the weight of the CuO that resulted …show more content…
First, 0.66 g of Cu(NO3)2.2.5H2O was dissolved in 20 mL of deionized H2O. Next, 50 mL of NH3 was added to the mixture until the resulting Cu(NO3)2 dissolved completely. After this, deionized H2O was added until the volume of the solution reached 100 mL. 40 ml of this solution was added to a different beaker and 60 mL of deionized H2O was added to it to make another solution of different concentration. The above steps were repeated four times and a sample of each of the five solutions was placed in a Spectronic 20 spectrophotometer to measure the absorbance of 610 nm. The same steps used to prepare the first standard solution were utilized to prepare a solution using 0.11 g of copper hydroxyl nitrate to measure its absorbance. The best fit line of the concentration vs. absorbance graph for the five standard solutions was used to determine the concentration of the solution containing copper hydroxyl nitrate. Finally, the concentration of the copper hydroxyl nitrate was used to determine the percent copper in the copper hydroxyl