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Part A
What is the cell potential at 25 degrees C for the following galvanic cell? Pb (s) | Pb^2+ (1.0M) || Cu^2+ (1.2x10^-4 M) | Cu (s)
Part B
If the Pb^2+ concentration is maintained at 1.0 M, what is the Cu^2+ concentration when the cell potential drops to zero?
NaOH is added to K2CrO4 and K2Cr2O7 separately in test tubes and a color change is noted.
What is the HCl concentration of 33.7 mL of 0.350 M NaOH is required to titrate a 30.0 mL sample of the acid?
A solution of a dye in a 0.80 cm cuvette of concentration 1.25 x 10^-3 M had an absorbance of 0.115 at a particular wavelength. What was the molar absorptivity of the dye
Describe the effect of this on [CH3COOH] and [CH3COO-] (their concentrations). Account for your answer in terms of number of moles of protons transferred. Also, has the capacity of the buffer been exceeded? Explain.
Propanoic acid, HC3H5O2, ionizes in water. A 0.496 g sample of sodium propanoate, NaC3H5O2 (molar mass: 96.07 g/mole) is added to a 50.0 mL sample of a 0.265 M solution of propanoic acid. Assuming that no change in the volume of the solution occur..
Analysis with an elaborate instrument indicates that substance A contains two elements. Substance B and substance C react to give a new substance D. Substance E decomposes upon heating to give substance F and substance G. Heating substance H to 10..
a solution is prepared by adding 8.28 grams of an unkown compound to 217 g of cyclohexane c6h12. this solution freezes
Calculate in how many years these signs will have to be replaced. Assume that the end lifetime is when the emission from the tritium is down to only 37% from the initial emission when installed
suppose .853L of H2 is collected at 15 degrees celcius and 782 mmHg. how much electricity in coulombs must have passed through the solution
Does the melting point obtained for your product indicate that the sample is indeed phenacetin? What additional evidence can you cite
The labeling of acetone with 18O is catalyzed by both acid and base. Show Mechanisms for both reactions.
a mixture consists of 35% He(g) and 65% N2(g) by mass. If it exerts a total pressure of 2.15 atm, what is the partial pressure of helium
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