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Part A: What is the pH of a buffer prepared by adding 0.607 mol of the weak acid HA to 0.609 mol of NaA in 2.00 L of solution? The dissociation constant Ka of HA is 5.66×10-7. Express the pH numerically to three decimal places.
Part B: What is the pH after 0.150 mol of HCl is added to the buffer from Part A? Assume no volume change on the addition of the acid. Express the pH numerically to three decimal places.
Part C: What is the pH after 0.195 mol of NaOH is added to the buffer from Part A? Assume no volume change on the addition of the base. Express the pH numerically to three decimal places.
How long does it take to deposit a coating of gold 1.00 um thick on a disk-shaped medallion 4.00 cm in diameter and 2.00 mm thick at constant of 86A? The density of gold is 19.3 g/cm^3 and the gold is from an Au(III) solution.
For the isoelectronic series[V(CO)6]-, Cr(CO)6, and [Mn(Co)6]+, does the energy of the metal to ligand charge-transfer bands increase or decrease with increasing charge on the complex? Why?
What is the solute and solvent of Antifreeze? What is the solute and solvent of Pepsi? What is the solute and solvent of Sterling Silver?
Explain the following given for each statement in determining the sequence of peptide with concise (short) but complete response. you must state the specificity of each statement implication in determining the sequence of octapeptide
Question- Part 1) For the following unbalanced chemical equation, show the two half - cell reactions, and balance the equation
Marble (calcium carbonate) reacts with hydrochloric acid solution to form calcium chloride solution, water, and carbon dioxide. What is the percent yield of carbon dioxide
In a solution of dopamine, the density is 1.039 g/mL, experiments show that there is 1.39 mmol dopamine. How many grams of dopamine in the sample. The chemical formula of dopamine is C8H11NO2.
A sample of gas occupies 1.55L at STP. Remember, pressure at STP is 1.0 atm. What will the volume be if the pressure is increased to 50 atm while the temperature remains constant
Germanium has the same structure as silicon, but the unit cell size is different because Ge and Si atoms are not the same size. If you were to repeat the experiment described in the previous problem but replace the Si crystal with a Ge crystal, wo..
molarity of acetic acid in a 15ml sample of vinegar that requires 22.7 ml of 0.550M solution of NaOH to reach neutralization point
Calculate the number of 5.70m NaOH must be added to 666 ml of a buffer that contains .0205m C2H4O2 and .0260m C2H3NaO2 to increase the ph to 5.75.
Determine the [H3O+], [OH-], pH, and pOH for each of the following solutions. A solution with a pH of 6.25
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