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Explain what mass of solid KF (molar mass = 58.1 g/mol) must be added to 2.0 L of 0.25 M HF to make a buffer with a pH of 3.14? (pKa for HF = 3.14)
62 mL of 1.7M solution is diluted to a volume of 208mL. A 104mL portion of that solution is diluted using 141mL of water. What is the final concentration
The molarity of an aqueous solution of potassium hydroxide is finding out by titration against a 0.138M hydrobromic acid solution. If 27.4ml of the base are required to neutralize 21.6ml of hydrobromic acid explain what the moalrity of the potassi..
A wildlife biologist is interested in testing the pH of the water in a lake. He obtains a 200. mL sample of the water and titrates this sample with a .050 M NaOH solution.
dissolved in 200 mL of solution. What is the pH of the solution? pKa1 = 6.37 and pKa2 = 10.25.
State whether each of the following properties of the main group elements generally increases or decreases a) From left to right across a period b) From top to bottom within a group- metallic character, atomic size, ionization energy, acidity of oxid..
A buffer is prepared by adding 1.50X 10^2 ml of 0.250 M NaOH to 2.50X10^2 ml of 0.350 M weak acid, HB. The solution is diluted to 1.00 L. If the pH of the resulting solution is 6.55, what is the pKa of the weak acid
the temperature dependance of vapour pressure of solid sulfur dioxide is represented by logp 10.5916- 1871.2t liquid
Write the half-reactions and the products for the reactions that occur in the electrolysis of a saturated solution of magnesium sulfate using inert electrodes.
Compute the band gap for this semiconductor material after Consideing an intrinsic semiconductor with a conductivity σ that triples between the temperature 27 degree Celsius and 57 degree celsius.
What volume and mass of steam at 100 degrees celsius and 760 torr would release the same amount of energy as heat during condensation as 65.5 cm(cubed) of liquid water would release during freezing?
A solution was made by dissolving 5.38 g of a non-volatile solute in 137.7 g of acetone. The solution boiled 1.77 ºC above the boiling point of acetone. Determine the molar mass in g/mol of the solute. Kb = 1.71 ºC/molal.
Draw the Newman projection and the corresponding potential energy diagram of "n-butane" conformers, rotating along C2-C3.
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