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Question 22 An electrochemical cell transfers 2 moles of electrons per mole of reactant and has...
Use the References to access important values if needed for this question An electrochemical cell consists of a Pt/H(aq,1.00 M) H (8) cathode connected to a Pt/H(aq)|Hz(8) anode in which the H concentration is that of a buffer consisting of a weak acid, HA(0.117 M), mixed with its conjugate base, A (0.193 M). The measured cell voltage is Ecell -0.169 V at 25 °C, with Pt. -1.00 atm at both electrodes. Calculate the pH in the buffer solution and the...
Question 2 of 22 Gastric juice is made up of substances secreted from parietal cells, chief cells, and mucous-secreting cells. The cells secrete HCl, proteolytic enzyme zymogens, mucin, and intrinsic factor. The pH of gastric juice is acidic, between 1-3. If the pH of gastric juice is 2.4, what is the amount of energy (AG) required for the transport of hydrogen ions from a cell (internal pH of 7.4) into the stomach lumen? Assume that the potential difference across the...
Question 4 2 pts Using the virtual lab above and Appendix C in your lab manual, complete the following statement Note: Record the values for the spontaneous reaction. A Ag/Ni voltaic cell has an Eo of V. If you change the concentration of the solution in each cell to 0.01 M, the EMF is V. This change is because the standard potential, Eo is defined at M, so K, atm, and differing from those standard conditions will change the observed...
e. 18 Test Your Knowledge MULTIPLE CHOICE: Choose the one best answer. 1. Each element has its own characteristic atom in which a. the atomic mass is constant. b. the atomic number is constant. c. the mass number is constant. d. Two of the above are correct. e. All of the above are correct. 2. Which of the following is not a trace element in the human body? a. iodine b. zinc c. iron d. calcium e. fluorine 3. A...