2.) Phosphorus in urine can be determined by treating with molybdenum(VI) and then reducing the phosphomolybdate with aminonaphthol sulfonic acid to give the characteristic molybdenum blue color. This absorbs at 690 nm. A patient excreted 1270mL urine in 24 h, and the pH of the urine was 6.5. A 1.00-ml aliquot of the urine was treated with molybdate reagent and aminonaphthol sulfonic acid and was diluted to a volume of 50.0 mL. A series of phosphate standards was similarly treated. The absorbance of the solutions at 690 nm, measured against a blank, were as follows: Solution Absorbance 1.00 ppm P 2.00 ppm P 3.00 ppm P 4.00 ppm P Urine sample 0.625 (a) Calculate the number of grams of phosphorus excreted per day. 0.205 0.410 0.615 0.820

2.) Phosphorus in urine can be determined by treating with molybdenum(VI) and then reducing the phosphomolybdate with aminonaphthol sulfonic acid to give the characteristic molybdenum blue color. This absorbs at 690 nm. A patient excreted 1270mL urine in 24 h, and the pH of the urine was 6.5. A 1.00-ml aliquot of the urine was treated with molybdate reagent and aminonaphthol sulfonic acid and was diluted to a volume of 50.0 mL. A series of phosphate standards was similarly treated. The absorbance of the solutions at 690 nm, measured against a blank, were as follows: Solution Absorbance 1.00 ppm P 2.00 ppm P 3.00 ppm P 4.00 ppm P Urine sample 0.625 (a) Calculate the number of grams of phosphorus excreted per day. 0.205 0.410 0.615 0.820

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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2. One of the common methods used to determine phosphorus in urine isto treat urine with molybdenum(VI) resulting in a complex compoundof 12- molybdophosphate and then reduced using ascorbic acid produces a blue-colored compound called molybdenum blue (max = 650 nm). A patient's urine sample collected over 24 hours produced 1122 mL of urine. A total of 1 mL of the sample was treated with Mo(VI) and ascorbic acid and diluted until it reached a volume of 50 mL. A calibration curve is also prepared by treating 1 mL of standard phosphate solution in the same way. The absorbance of the standard solution and the sample was then measured at a wavelength of 650 nm and produced the following data: Solution Absorbance at λ 650 nm Phosphate 1 ppm Phosphate 2 ppm Phosphate 3 ppm Phosphate 4 ppm Urine sample 0,230 0.436 0,638 0,848 0.518 a. Create a calibration curve for the data and determine the slope, intercept, and R values of 2! Determine the concentration of phosphates found in urine samples…