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Lead poisoning in children used to be treated with intravenous injections of EDTA. If the concentration of EDTA in the blood of the patient is 2.60x10^-8 M and the formation constant for the complex, {Pb(EDTA)}2- is 2.00x10^18, what is the concentration ratio of the free (and potentially toxic) Pb2+(aq) in the blood to the much less toxic Pb2+ -EDTA complex?
small protein in 5.00mL aqueous solution has an osmotic pressure of 7.85 torr at 23.1C. What is the molar mass of the protein?
What is the value of Kf for acetic acid, given that its freezing temperature is 16.6 C and its density is 1.049 g/mL? Experiments show that a solution prepared by dissolving 5.00 grams of water
An atomic emission spectrum of hydrogen shows the following three wavelengths: 1875nm, 1282nm, and 1093nm. Assign these wavelengths to transitions in the hydrogen atom.
You mix 50 ml of a weak monoprotic acid with 50 ml of NaOH solution in a coffee cup calorimeter. Both solutions and the calorimeter were initially at 22 C.
Draw the Lewis Structure and make a rough three-dimensional sketch of each species.
Write a mechanism for the acid-catalyzed transesterification reaction of ethyl acetate with 1-butanol, which gives butyl acetate.
Describe the two methods for determing the volume of the vapor In a Molar Mass of a Volatile Liquid experiment? Which method is likely to give more precise results? Why?
Write the formulas for each of the following ions and compounds: (a) tetrahydroxozincate(ll) (b) pentaaquachlorochromium
A 4.20 g nugget of pure gold absorbed 299 J of heat. The initial temperature was 22.0°C. What was the final temperature.
How many grams of butane must be burned to provide the heat needed to melt a 85.0-g piece of ice (at its melting point) and bring the resulting water to a boil (with no vapourization)? Assume a constant pressure of 1 bar and use the following data
Silver chloride, often used in silver plating, contains 75.27% Ag.Calculate the mass of silver chloride in grams required to make 4.4 grams of silver plating.
The buffer has a concentration of 150 mMol ( 150 mM of KH2PO4 / 150 mM K2HPO4. The pKa of the drug ephedrine is 9.6. Will the drug have a negative, positive, or neutral?
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