The measurement of pH using a glass electrode obeys the Nernst equation. The typical response of a pH meter at 25 00°C is given by the equation where contains the potential of the reference electrode and all other potentials that arise in the cell that are not related to the hydrogen ion concentration. Assume that = 0.250 V and that a. What is the uncertainty in the values of pH and [H + ] if the uncertainty in the measured potential is ±1 m V (± 0.001 V)? b. To what precision must the potential be measured for the uncertainty in pH to be ± 0.02 pH unit?
The measurement of pH using a glass electrode obeys the Nernst equation. The typical response of a pH meter at 25 00°C is given by the equation where contains the potential of the reference electrode and all other potentials that arise in the cell that are not related to the hydrogen ion concentration. Assume that = 0.250 V and that a. What is the uncertainty in the values of pH and [H + ] if the uncertainty in the measured potential is ±1 m V (± 0.001 V)? b. To what precision must the potential be measured for the uncertainty in pH to be ± 0.02 pH unit?
Solution Summary: The author defines cell potential as the measure of energy per unit charge available from the redox reaction to carry out the reaction.
The measurement of pH using a glass electrode obeys the Nernst equation. The typical response of a pH meter at 25 00°C is given by the equation
where contains the potential of the reference electrode and all other potentials that arise in the cell that are not related to the hydrogen ion concentration. Assume that = 0.250 V and that
a. What is the uncertainty in the values of pH and [H+] if the uncertainty in the measured potential is ±1 m V (± 0.001 V)?
b. To what precision must the potential be measured for the uncertainty in pH to be ± 0.02 pH unit?
Q3: Write in the starting alkyl bromide used to form the following products. Include any
reactants, reagents, and solvents over the reaction arrow. If more than one step is
required, denote separate steps by using 1), 2), 3), etc.
H
OH
racemic
OH
OH
5
racemic
Draw the Lewis structure of the SO3-O(CH3)2 complex shown in the bottom right of slide 2in lecture 3-3 (“Me” means a CH3 group) – include all valence electron pairs and formal charges.From this structure, should the complex be a stable molecule? Explain.
Predict all organic product(s), including stereoisomers when applicable.
Chapter 17 Solutions
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell