Phosphate buffer solution, which is used in preparing the BOD dilution water is prepared by dissolving 0.85 g of monobasic potassium phosphate (KH2PO4), 2.175 g of dipotassium hydrogen phosphate (K2HPO4), 3.34 g of disodium hydrogen phosphate heptahydrate (Na2HPO4.7H2O), and 0.17 g of ammonium chloride (NH4CI) in about 50 mL distilled water before further diluting to 100 mL using distilled water. Assuming that all phosphate compounds are 100 % (w.w) pure and dissociated completely in the form of free phosphate ions (PO43-) in water, calculate the concentration in ppm of the total free phosphate ions (PO43-) in the 100 mL solution. Given that the atomic weight for Nitrogen, N is 14.0067 g/mole; Hydrogen, H is 1.0079 g/mole;, Cl is 35.453 g/mole; Phosphorus, P is 30.9738 g/mole; Oxygen, O is 15.9994 g/mole; Sodium, Na is 22.9897 g/mole; Potassium, K is 39.0983 g/mole

Phosphate buffer solution, which is used in preparing the BOD dilution water is prepared by dissolving 0.85 g of monobasic potassium phosphate (KH2PO4), 2.175 g of dipotassium hydrogen phosphate (K2HPO4), 3.34 g of disodium hydrogen phosphate heptahydrate (Na2HPO4.7H2O), and 0.17 g of ammonium chloride (NH4CI) in about 50 mL distilled water before further diluting to 100 mL using distilled water. Assuming that all phosphate compounds are 100 % (w.w) pure and dissociated completely in the form of free phosphate ions (PO43-) in water, calculate the concentration in ppm of the total free phosphate ions (PO43-) in the 100 mL solution. Given that the atomic weight for Nitrogen, N is 14.0067 g/mole; Hydrogen, H is 1.0079 g/mole;, Cl is 35.453 g/mole; Phosphorus, P is 30.9738 g/mole; Oxygen, O is 15.9994 g/mole; Sodium, Na is 22.9897 g/mole; Potassium, K is 39.0983 g/mole

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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