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1. According to the WHO, is the water safe to drink? Show all work.

1. According to the WHO, is the water safe to drink? Show all work.

Chemistry
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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English (Saudi Arabia) measured a charge under the stripping curve of 3.71 x 103 coulombs. 1. According to the WHO, is the water safe to drink? Show all work. Page 4 of 4 2. Could you experimentally determine if the water is safe to drink by setting up a different electrochemical cell? This involves using a Pb wire and a suitable reference electrode and measuring the equilibrium potential of the Pb wire and the dissolved Pb²+ cations in the water sample? write a few sentences fully explaining your thoughts. MacBook Pro Focus E ER E I
Transcribed Image Text:English (Saudi Arabia) measured a charge under the stripping curve of 3.71 x 103 coulombs. 1. According to the WHO, is the water safe to drink? Show all work. Page 4 of 4 2. Could you experimentally determine if the water is safe to drink by setting up a different electrochemical cell? This involves using a Pb wire and a suitable reference electrode and measuring the equilibrium potential of the Pb wire and the dissolved Pb²+ cations in the water sample? write a few sentences fully explaining your thoughts. MacBook Pro Focus E ER E I
English (Saudi Arabia) 20 F3 A. Arizonium (Az) is a newly discovered element. Below is a Table (*note the units) listing the chemical potentials at 298 K of the Az* cation, the Azo oxide and H₂O obtained by first principles DFT calculations. Dissolved substances Az++ H+ Solid substances Az ΑΖΟ Liquid substances H₂O μº chemical potential (calories/mole) 5,000 0 000 000 F4 0 -40,000 Construct the potential-pH diagram for Az for the concentration of Az²+ in the electrolyte = 1M. Show all work and the equations used to construct the diagram. F5 -57,000 B. Since 1993 the World Health Organization (WHO) has maintained that the smallest maximum allowable level of lead in drinking water is 5µg/L. A colleague of yours is collecting samples from the drinking water supply in a foreign country and is using an electrochemical technique to determine the amount of Pb2+ cations in the water. He set up an electrochemical cell of 1 L (liter) in volume and used the water sample containing Pb²+ cations to electroplate Pb on to an inert gold cathode. The electroplating was completed in 1 week. Then he stripped the metallic Pb from the gold surface and measured a charge under the stripping curve of 3.71 x 103 coulombs. MacBook Pro N F6 & F7 * DII FB F9 Focus E E I
Transcribed Image Text:English (Saudi Arabia) 20 F3 A. Arizonium (Az) is a newly discovered element. Below is a Table (*note the units) listing the chemical potentials at 298 K of the Az* cation, the Azo oxide and H₂O obtained by first principles DFT calculations. Dissolved substances Az++ H+ Solid substances Az ΑΖΟ Liquid substances H₂O μº chemical potential (calories/mole) 5,000 0 000 000 F4 0 -40,000 Construct the potential-pH diagram for Az for the concentration of Az²+ in the electrolyte = 1M. Show all work and the equations used to construct the diagram. F5 -57,000 B. Since 1993 the World Health Organization (WHO) has maintained that the smallest maximum allowable level of lead in drinking water is 5µg/L. A colleague of yours is collecting samples from the drinking water supply in a foreign country and is using an electrochemical technique to determine the amount of Pb2+ cations in the water. He set up an electrochemical cell of 1 L (liter) in volume and used the water sample containing Pb²+ cations to electroplate Pb on to an inert gold cathode. The electroplating was completed in 1 week. Then he stripped the metallic Pb from the gold surface and measured a charge under the stripping curve of 3.71 x 103 coulombs. MacBook Pro N F6 & F7 * DII FB F9 Focus E E I
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