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Solid chromium (III) hydroxide (Cr(OH)3) is added to pure water so that at equilibrium some solid remains undissolved. Given that the solubility product is 6 x 10-31 M4, what is the equilibrium concentration of the hydroxide ion (OH-) in the water? Please show formulas used, your answer with units and calculations as text below or an attached file.
Also, give an estimate the pl of this tetrapeptide (you may assume the pKa of any acidic R group is 4, the pKa of any basic R group is 11.5, and the pKa of the alpha-COOH is 2, and the alpha-NH3 is 9.5).
Predict the anode, cathode, and overall cell reactions when an aqueous solution of each of the following salts is electrolyzed in a cell having
If 465 mL of oxygen at STP is used in the reaction, what volume of CO2 measured at 37 degrees C and 0.973 atm, is produced?
Why does the electron energy threshold of dissociation almost always exceeds the actual dissociation energy in contrast to dissociation, stimulated by vibrational excitation
A salt water mixture is 33.0% (w/w) walt. (The w/w refers to weight / weight or mass / mass). If there are 300.0 g salt in the mixture, what is the total weight of the mixture?
A buffer is made with 25mL of 1.0 M HC2H3O2 and 25mL of 1.0 M NaC2H3O2. Calculate the theoretical pH. I know the pH is 4.74.
A sample of vinegar has a freezing point depression of 2.0 degrees C. What is the estimated percent by mass of acetic acid in the vinegar? Molar mass of acetic acid is 60g/mol
Kc = 9.7 at 900 K for the reaction NH3(g) + H2S(g) --> NH4HS(s) If the initial concentrations of NH3(g) and H2S(g) are 2.0 M, what is the equilibrium concentration of H2S(g)?
If solubility of a gas is 7.5 g/L at 404 kPa pressure, what is the solubility of the gas when the pressure is 2021 kPa?
The compound lead acetate is a strong electrolyte. Write the reaction when lead acetate is put into water: Make sure to include positive or negative and whether or not each one is (s) (l) or (aq)
How much energy is released per Kg of Dilithium formed? Mass of one atom of 6 Li is 6.015121 amu. Do not know where to start.
Determine the value of Kc for the following reaction if the equilibrium concentrations are as follows: [N2]eq = 3.6 M, [O2]eq = 4.1 M, [N2O]eq = 3.3 × 10-18 M.
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