Directions:(1) Determine the total volume of the standards by using a formula in the appropriate boxes (your instructor will help you with this).(2) Determine the concentration of Cu2+ in each standard, also using a formula in the appropriate cells.(3) Plot the absorbance as a function of Cu2+ concentration. Determine the equation for the best-fit line.1.0 M ethylenediamine(mL)concentration Cu2+ absorbance (AU)at 550 nm0.01 M CuSO4 5H2OH2Ototal volumestock Cu2+standard(mL)(mL)(mL)(units)concentration (M)10.500.009.500.0250.0120.500.509.000.0310.0130.501.008.500.0480.0140.502.007.500.1530.0150.503.006.500.2230.010.504.005.500.3070.0170.505.004.500.3840.01 (4) Using your calibration curve, determine the concentration of Cu2+ in unknown A.(5) Next, calculate the concentration of Cu2+ in the stock solution A used to make unknown A.volume of CUSO4absorbance (AU)1.0 M ethylenediamine(mL)H2Ototal volumeconcentration Cu2+stock A Cu2+unknown5H20 of unknown(mL)(mL)(units)at 550 nmconcentration (M)conc; stock A (mL)A0.502.007.500.25(6) Repeat steps 4-5 for unknowns B and C.volume of CuSO41.0 M ethylenediamine(mL)total volume(mL)concentration Cu2+ absorbance (AU)at 550 nmH2Ostock B Cu2+unknown5H2O of unknown(mL)(units)concentration (M)conc; stock B (mL)В0.503.006.500.451volume of CuSO4concentration Cu2+| absorbance (AU)1.0 M ethylenediamine(mL)H2Ototal volumestock C Cu2+unknown5H2O of unknown(mL)(mL)(units)at xx nmconcentration (M)conc; stock C (mL)0.504.505.000.283

The data is given for absorbance versus concentration of different solutions.“Since you have posted…

1) Determine the total volume of the standards by using a formula in the appropriate boxes (your instructor will help you with this). 2) Determine the concentration of Cu2+ in each standard, also using a formula in the appropriate cells. 3) Plot the absorbance as a function of Cu2+ concentration. Determine the equation for the best-fit line. standard 1.0 M ethylenediamine (mL) 0.01 M CuSO4 5H2O (mL) H2O (mL) 1 0.50 0.00 9.50 2 0.50 0.50 9.00 3 0.50 1.00 8.50 4 0.50 2.00 7.50 5 0.50 3.00 6.50 6 0.50 4.00 5.50 7 0.50 5.00 4.50 total volume (mL) concentration Cu2+ (units) absorbance (AU) at 550 nm stock Cu2+ concentration (M) 0.025 0.0 0.031 0.0 0.048 0.0- 0.153 0.01 0.223 0.01 0.307 0.0- 0.384 0.0

1) Determine the total volume of the standards by using a formula in the appropriate boxes (your instructor will help you with this). 2) Determine the concentration of Cu2+ in each standard, also using a formula in the appropriate cells. 3) Plot the absorbance as a function of Cu2+ concentration. Determine the equation for the best-fit line. standard 1.0 M ethylenediamine (mL) 0.01 M CuSO4 5H2O (mL) H2O (mL) 1 0.50 0.00 9.50 2 0.50 0.50 9.00 3 0.50 1.00 8.50 4 0.50 2.00 7.50 5 0.50 3.00 6.50 6 0.50 4.00 5.50 7 0.50 5.00 4.50 total volume (mL) concentration Cu2+ (units) absorbance (AU) at 550 nm stock Cu2+ concentration (M) 0.025 0.0 0.031 0.0 0.048 0.0- 0.153 0.01 0.223 0.01 0.307 0.0- 0.384 0.0

Chemistry

10th Edition

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

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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