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Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C6H5CO2H) and 0.15 M sodium benzoate (C6H5COONa). [Ka = 6.5 ? 10-5 for benzoic acid]
Is Chloride ion or water a stronger ligand? explain. is water or ammonia a stronger ligand? explain
A reactant R is being consumed in a first-order reaction. What fraction of the initial R is consumed in 4.0 half-lives
Express the concentration of a .0560 M aqueous solution of flouride, F-, in mass percentage and in parts per million. Assume the density of the solution is 1.00g/mL.
Write another equation showing how it acts as a base toward water. Express your answer as a chemical equation. Identify all of the phases in your answer.
Is dissolving KHT at 25.0 celsius spontaneous or non spontaneous; is there a temperature for this system where delta G=0?
A mixture of two miscible solvents that may be used as the solvent for a recrystallization experiment would be which of the following
Calculate the minimum pH difference between the stroma and lumen, so that three protons passing through an ATP synthase would provide enough energy for the generation of one ATP molecule
what is the wavelength ,in nanometers, of light with an energy content of 1979Kj/mol. In what portion of the electromagnetic spectrum in this light
Calculate the pH of the solution resulting from the addition of 10.0 mL of 0.10 M NaOH to 50.0 mL of 0.10 HCN solution.
What is the concentration of a solution of silver nitrate if 50.0mL of the solution reacting with excess potassium chloride gives 10g of precipitate
Diet cola drinks have a pH of about 3.0, while milk has a pH of about 7.0. How many times greater is the H3O+ concentration in diet cola than in milk
Calculate the equilibrium concentration of H3O+ in the solution if the initial concentration of C6H5COOH is 6.1×10?2 M.
Calculate the molar concentration of OH- ions in a 0.560 M solution of hypobromite ion (BrO-; Kb = 4.0 x 10^-6). What is the OH- and PH
A buffer is made up of 355 mL each of 0.200 M NaHCO3 , and 0.134 M Na2CO3 . Assuming that volumes are additive, calculate
Write a balanced net ionic equation for the reaction of each of the following aqueous solutions with H+ ions.
The partial charge on the phosphorus atom in the PO4(-3) ion is +2.52. What is the partial charge on each oxygen atom
Hydrogen has an electronegativity value between boron and carbon and identical to phosphorus. With this in mind, rank the following bonds in order of polarity with 1 being the most polar and 5 being
The initial concentration of lead(II)nitrate is 0.250M. and we used 1.00 ml. the lead(II)nitrate was titrated with 7.96 ml of 0.0500M of potassium iodide. A) Determine the concentration of lead(II)
If a triacylglycerol in peanut oil that contains one palmitic acid, one oleic acid, and one linoleic acid is completely hydrogenated, what is the product
Jojoba wax in candles consists of stearic acid and a 22-carbon saturated alcohol. Write the structure of jojoba wax.
highlight by clicking on the asymmetric carbons if any, and indicate whether each compound is Chiral and Number of stereocenters
If a laser operated on the n=5 to n=2 transition of a H atom, what wavelength in nm photon would be emitted? (E2= -82 kJ/mol, E1= -328 kJ/mol)
A student weighs 0.12311 g of na2co3 and dissolves it in 50.0 ml of water in an erlenmeyer flask. how many moles of hcl will be needed to reach the end point of titration