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A buffer that contains 0.511 M of a base, B and 0.897 M of its conjugate acid BH+, has a pH of 9.79. What is the pH after 0.00514 mol of HCl are added to 0.593 L of the solution?
An aqueous CaCl2 solution has a vapor pressure of 82.1 mmhg at 50 C . The vapor pressure of pure water at this temperature is 92.6 mmhg What is the concentration of in mass percent?
If the acid dissociation constant, Ksuba, for an acid HA is 8 x 10^-4 at 25 degree C, what percent of the acid is dissociated in a 0.50 M solution of HA at 25 degree C?
A student used 40.5mL of 0.48M sodium carbonate solution and 45.6mL of the hydrochloric acid solution. The substance in the beaker at the end of the experiment had a mass of 0.93g. Calculate the concentration of the hydrochloric acid solution.
Suppose you have just added 200.0 ml of a solution containing 0.5000 moles of acetic acid per liter to 100.0 ml of 0.5000 M NaOH. What is the final pH? The Ka of acetic acid is 1.77 x 10^-5
Using condensed electron configurations and Lewis electron-dot symbols to depict the monatomic ions formed from each of the following reactants, predict the formula of the compound the ions produce. N and Mg
Calculate the molar mass and density of dry air at 0 °C and 1.0 atm. Assume ideal behavior and use two significant figures
What potential issues might arise if the pH of your buffer is too close to the pI of your protein of interest? Why might an extreme buffer pH ( 9) be unsuitable?
How many milliliters of 0.105 M HCl are needed to completely neutralize 60.0 mL of 0.108 M Ba(OH)2 solution?
How many equivalent resonance forms can be drawn for SO2 without expanding the octet on the sulfur atom? (A) 0 (B) 1 (C) 2 (D) 3 (E) 4 17. In which of these species does the first atom in the chemical formula violate the octet rule? 18. How many e..
The neutrons from one treatment source have an average velocity of 3.4 x 10^7 m/s. If the velocities of the individual neutrons are known to within 2% of this value, what is the uncertainty in this position of one of them
Suppose that you titrate a 3 g sample of orange juice and it turns out to contain only 95.5mg of vitamin C. Further, it took 32.45mL of DCP solution to reach the end point of the titration.
The reaction 2NO+Cl2=2NOCl is carried out in a closed vessel. If the partial pressure of NO is decreasing at the rate of 20 torr/min, what is the rate of change of the total pressure of the vessel?
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