How Much Copper Is in the Coin?

We calibrated three dissimilar molarities of hair (II) nitrate. We tested for the % infection of 1M, 0. 1M, and 0. 01M and plan the data collected on a calibration curve ground on dousing and absorbance. We used nitric acid to dissolve a penny to produce another copper (II) nitrate to test its %Transmittance and bandage that on the graph to discover the concentration of that substance which came disclose to be about . 21M. We attempted to develop a method for determine the concentration of three different diluted copper (II) ion solutions.We also attempt to determine the concentration of copper at bottom a penny by dissolving it in nitric acid. We used a spectrometer to flier the %Transmittance of each and were able to convert it to it absorbance in order to plot it on our calibration curve. We used test tubes to contain the solution and position the spectrometers to 20, which were preset by the TA. Prepare three different beakers with one containing 0. 01M, 0. 1M, and 1M of copper (II) nitrate ( Cu(NO3)2).Fill three different test tubes full, each having different amounts of concentrations of the copper (II) nitrate. By using the spectrometer measure the %Transmittance (%T) for each. modify each %T into its absorbance by the equation A(absorbance)=log(100/%T) and plot on a graph. The y-axis should be labeled A and the axis should be labeled Concn for the concentration of molarity. Draw the beaver fit line through the graph. Place a penny in a beaker and care richly add HNO3 and occasionally whirl so that the penny can completely dissolve.Once the penny is fully dissolved, fill another test tube with the newly created copper (II) nitrate and again, test for the %Titration and convert it to the A. Plot it on the graph on the best fit line and find the amount of concentration that was found within the new solution. When dissolving the penny with nitric acid make trustworthy to perform it within the hood seeing as the gas that is created is toxic. in like manner be very cautious when working with nitric acid out-of-pocket to the fact that is s corrosive to the skin.