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For a Bradford assay, the instructor will make a Bradford reagent dye by mixing 50 mL of 95% v/v ethanol with 100 mg of Coomassie Blue followed by the addition of 100 mL of 85% v/v phosphoric acid. This entire mixture is then diluted to 1 liter with water. What is the final concentration of phosphoric acid
To what volume should you dilute 124 mL of an 7.95 M CuCl2 solution so that 49.5 mL of the diluted solution contains 5.8 g CuCl2
Calculate the mass of propylene glycol that must be added to .360 kg of water to reduce the vapor pressure by 2.87 torr at 40 degrees celsius (Ph20 at 40 degrees = 55.3)
What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25 degrees Celsius
The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.60 mL of a 0.330 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760.
Choose any two temperatures and corresponding vapor pressures in the table given, and use those values to calculate Delta H vap for mercury (in kJ / mol).
What molarity of aqueous aluminum sulfate solution can be expected to show the same conductivity
Consider the addition of 22.59 mL of 0.1643 M aqueous HCl to 19.01 mL of 0.1558 M aqueous NaOH at 25°C. Assuming the volumes are additive, what is pOH of the resulting solution?
The first-order rate constant for the decomposition of C2H5Cl, C2H5Cl(g) C2H4(g) + HCl(g) at 27 oC is k = 7.27e-30 s-1. Suppose we start with 0.0813 mol of C2H5Cl in a volume of 6.0 L. How many moles of C2H5Cl will remain after 2.20e+27 min
Calculate the quantity of heat energy in kilocalories evolved when 75 g of liquid water forms ice at 0 0C. (heat of solidification = 80 cal/g).
Consider a waterbody at that temperature containing 7.0 mg l-1 oxygen. By photosynthesis, 1.5 mg of carbon (as carbon dioxide) is converted to biomass (CH3O) during a single hot day.
If you want to prepare a buffer with a pH of 4.30 with HOAc (acetic acid) and NaOac, what ration of NaOAc/HoAc should you use? (pKa of HOAc is 4.74)
A buffer solution of pH 5.3 is to be prepared from propionic acid and sodium propionate. The concentration of sodium propionate must be 0.50 M. What should the concentration of propionic acid be? Ka = 1.3 X 10-5
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