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When an ion-selective electrode for X was immersed in 0.0670 M XCl, the measured potential was 0.0250 V. What is the concentration of X when the potential is 0.0400 V? Assume that the electrode follows the Nernst equation, the temperature is at 25°C, and that the activity coefficient of X is 1.
Describe a common buffer system and elution method in ion exchange chromatography. What are the salt ions in the elution buffer good for
An aqueous solution contains the amino acid glycine. Assuming that the acid does not ionize in water, calculate the molality of the solution if it freezes at -1.1 degree centigrade.
A compound is 40% C 6.70% H and 53.3% O by mass. the molecular formula of this compound is 60 amu, what are the subscripts of C, H, O
calculate the pH of the buffer after the addition of 0.15 mL of 6M HCl based on the known value of Ka for acetic acid
The dissociation equilibrium constants for the protonated form of alanine (a diprotic amino acid H2X+) are ka1=4.6 x 10^-3 and ka2= 2.0 x 10^-10 What is the pH of 50.00 mL of a 0.100 M solution of alanine after 100.00 mL of 0.100 M NaOH has been a..
how might the addition of water helped convert this by product into the desired product?
When Lewis and Clark came through this area in the early 1800s they were forced to portage around the "Great Falls of the Missouri".
Provide a balanced equation for the oxidation of the following: 2-propanol to acetone by means of Cr2O7-2/H+. Please show all steps to obtain the final balanced equation.
Barium sulfate, BaSO4, is made by the following reaction: Ba(NO3)2(aq) + Na2SO4(aq) à BaSO4(s) + 2NaNO3(aq).
Up to Iron "Fe", the number of proton and neutron are about equal, after Fe the number of neutron began to rapidly increase, with respect to the number of proton, why?
The crystal lattice structure of LaF3 is different from those discussed. Assume it is unknown. Using the equation of Kapustinskii, estimate the lattice energy.
A flask containing only NO2(g) at an initial pressure of 8.60 atm is allowed to reach equilibrium. Calculate the total pressure in this flask at equilibrium.
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