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1. A 0.1430 g sample of copper was dissolved in 20 mL of 6 mol/L HNO3 and diluted to 100.0 mL in a volumetric flask. What is the concentration of copper in g/L in the flask? 21 +2e 0.1430g x- -0.00 22 5033 molof C 63.5461 J.. 0025033ml.0022 5033 Mx63.546=01439,Cs O4,1439 Mons O14391 Vol 0.1 2. The solution prepared in Q.1 was diluted one hundred times. Now what is the 1439 0. 100 L concentration of copper in units of g/L? Co143 %0.01439 0.01439 L %3D lo0 3. The standards were then prepared as described in the procedure and a 5 mL aliquot of unknown was pipetted into each of them. The intercept on the x axis was -4.12mL How many grams of copper were introduced in the 5 mL addition to each standard? 4. What is the original concentration of Cu in the unknown in g/L? 5. What is the original concentration of the unknown in ppm**.

1. A 0.1430 g sample of copper was dissolved in 20 mL of 6 mol/L HNO3 and diluted to 100.0 mL in a volumetric flask. What is the concentration of copper in g/L in the flask? 21 +2e 0.1430g x- -0.00 22 5033 molof C 63.5461 J.. 0025033ml.0022 5033 Mx63.546=01439,Cs O4,1439 Mons O14391 Vol 0.1 2. The solution prepared in Q.1 was diluted one hundred times. Now what is the 1439 0. 100 L concentration of copper in units of g/L? Co143 %0.01439 0.01439 L %3D lo0 3. The standards were then prepared as described in the procedure and a 5 mL aliquot of unknown was pipetted into each of them. The intercept on the x axis was -4.12mL How many grams of copper were introduced in the 5 mL addition to each standard? 4. What is the original concentration of Cu in the unknown in g/L? 5. What is the original concentration of the unknown in ppm**.

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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1. A 0.1430 g sample of copper was dissolved in 20 mL of 6 mol/L HNO3 and diluted to 100.0 mL in a volumetric flask. What is the concentration of copper in g/L in the flask? Cu Cang + 2e [Ca"], n • 00250 33 ml 0022 5033 Mx63.546=0.1439,CoMas Ol4,1439 -0.00 22 5033 molof C porl 0.1430g x- (S) 63.546g 0.100 L Vol 0.1 2. The solution prepared in Q.1 was diluted one hundred times. Now what is the concentration of copper in units of g/L? Crn = 1.43 h 0.01439 Ľl %3D new loo 3. The standards were then prepared as described in the procedure and a 5 mL aliquot of unknown was pipetted into each of them. The intercept on the x axis was -4.12mL How many grams of copper were introduced in the 5 mL addition to each standard? 4. What is the original concentration of Cu in the unknown in g/L? 5. What is the original concentration of the unknown in ppm**.
Transcribed Image Text:1. A 0.1430 g sample of copper was dissolved in 20 mL of 6 mol/L HNO3 and diluted to 100.0 mL in a volumetric flask. What is the concentration of copper in g/L in the flask? Cu Cang + 2e [Ca"], n • 00250 33 ml 0022 5033 Mx63.546=0.1439,CoMas Ol4,1439 -0.00 22 5033 molof C porl 0.1430g x- (S) 63.546g 0.100 L Vol 0.1 2. The solution prepared in Q.1 was diluted one hundred times. Now what is the concentration of copper in units of g/L? Crn = 1.43 h 0.01439 Ľl %3D new loo 3. The standards were then prepared as described in the procedure and a 5 mL aliquot of unknown was pipetted into each of them. The intercept on the x axis was -4.12mL How many grams of copper were introduced in the 5 mL addition to each standard? 4. What is the original concentration of Cu in the unknown in g/L? 5. What is the original concentration of the unknown in ppm**.
EXPERIMENT 6 - DETERMINATION OF COPPER IN AN AQUEOUS SAMPLE USING ATOMIC ABSORPTION SPECTROSCOPY Name Date 1. A 0.1430 g sample of copper was dissolved in 20 mL of 6 mol/L HNO3 and diluted to 100.0 mL in a volumetric flask. What is the concentration of copper in g L-1 in the flask? 2. The solution prepared in Q.1 was diluted one hundred times. Now what is the concentration of copper in units of g L-1? 3. The standards were then prepared as described in the procedure and a 5 mL aliquot of unknown was pipetted into each of them. The intercept on the x axis was -4.12 mL How many grams of copper were introduced in the 5 mL addition to each standard? 4. What is the original concentration of Cu in the unknown in g L-1? 5. What is the original concentration of the unknown in ppm**. * This means that there is exactly as much copper in 4.12 mL of standard as there is in 5 mL of unknown. ** In dilute aqueous solution 1 ppm = 1 mg L-1
Transcribed Image Text:EXPERIMENT 6 - DETERMINATION OF COPPER IN AN AQUEOUS SAMPLE USING ATOMIC ABSORPTION SPECTROSCOPY Name Date 1. A 0.1430 g sample of copper was dissolved in 20 mL of 6 mol/L HNO3 and diluted to 100.0 mL in a volumetric flask. What is the concentration of copper in g L-1 in the flask? 2. The solution prepared in Q.1 was diluted one hundred times. Now what is the concentration of copper in units of g L-1? 3. The standards were then prepared as described in the procedure and a 5 mL aliquot of unknown was pipetted into each of them. The intercept on the x axis was -4.12 mL How many grams of copper were introduced in the 5 mL addition to each standard? 4. What is the original concentration of Cu in the unknown in g L-1? 5. What is the original concentration of the unknown in ppm**. * This means that there is exactly as much copper in 4.12 mL of standard as there is in 5 mL of unknown. ** In dilute aqueous solution 1 ppm = 1 mg L-1
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