Calculate the value of the partition coefficient
At 20°C only 0.24 g of an organic acid "A" dissolves in 100. mL of water, but 2.70 g of the same acid dissolves in 100. mL of ether. Calculate the value of the partition coefficient.
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A 10.00 ml sample of an unknown aqueous nickel (II) solution was treated and found to produce 0.0532 g of Ni(DMG)2(Molar mass=288.9155g/mol) precipitate. Calculate the percent Nickel in the ore sample.
An aqueous solution of KCl is colorless, KMnO4 is purple, and K2Cr2O7 is orange. What color would you expect of an aqueous solution of Na2Cr2O7? Explain.
Use the Henderson-Hasselbalch equation to calculate the pH of each solution: Part A - a solution that is 0.20 M in HCHO2 and 0.13 M in NaCHO2 Part B - a solution that is 0.11 M in NH3 and 0.17 M in NH4Cl
The diatomic molecule AB has a dipole moment of 0.82 D and the A?B bond distance is 115 pm. Determine the percent ionic character of the bond in AB.
The Ka for H2PO41- is 6.3 x 10-8. The Ka for HS1- is 1.3 x 10-13. Both are amphoteric substances. a) What does amphoteric mean? Use H2PO41- to describe your definition.
If 58.3 grams of a 14% (m/m) solution of NaOH were boiled to dryness, how much NaOH would remain? If the recovered NaOH (from part a) were re-dissolved in 1.22kg of water, what would the resulting molaity be?
A sample of KClO3 was heated and 350. mL of O2 was collected over water. What mass of O2 was collected? Room T = 23°C, P =675. mmHg.
If 1 amu = 1.661 x 10-24 g, what is the weighted average atomic mass of a boron atom in grams
Consider the following data showing the initial rate of a reaction (A------> products) at several different concentrations of A.
One metric tonne(t) equals 1000kg. What is the amount of sulfur dioxide produced by a power plant that burns 7.5 million metric tonnes(t) of coal over a year? Assume that the coal is 2.4% sulfur by mass.
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