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What is the pH of a phosphate buffer when [H2PO4-] = 40 mM and [HPO42-] = 30 mM?
Assume the pKa for this titration is 7.2
Which of the following will not have ionic bonds?
What is the area of the circuit element in ? Write your answer in scientific notation. Round your answer to significant digits.
In the chemical formula for alu, there are 12 water molecules present. It is also possible to prepare the anhydrous compound potassium aluminum sulfate. On the "molecular scale" describe how a crystal of alum differs from a crystal of potassium al..
The compounds below cannot be identifed from IR and H NMR spectra alone. Explain. Suggest how other types of spectroscopy might be useful in solving the structure
If a sodium hydroxide solution were added to a solution containing lead(II) ions, sodium ions, nickel(II) ions and potassium ions, which ion(s) would remain in the supernatant?
Nitrosyl chloride (NOCl) decomposes at elevated temperatures according to the equation 2NOCl(g) ->2NO(g) + Cl2(g). Calculate Kp for this reaction at 680°C. (For this reaction ΔH° = 81.2 kJ/mol, ΔS° = 128 J/K·mol)
an acetic acid solution of 2.87 pH is titrated with 1.5 mL of bromocresol green. When the color changes to light green
Methyl red (Ka = 7.9 x 10^-6 is added to a buffered solution of unknown pH. Spectrophotometric measurements show the ratio of the basic to the acidic form of the indicator to be 2.57 to 1.000. Calculate the pH of the buffer solution.
What is the frequency of a photon emitted from a hydrogen atom when an electron makes a transition
An ore containing 24% solid inert and 76 mol% iron pyrites (FeS2) is roasted in the presence of dry air at 500 °C and 1 atm. Considering the given reactions.
Important information about Proteins, A globular protein in aqueous surroundings contains the following amino acid residues; phenylamine, methionine, glutamate, lysine, and alanine.
We add excess Na2CrO4 solution to 17.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.310 grams.
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