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You need to produce a buffer solution that has a pH of 5.50. You already have a solution that contains 10 mmol (millimoles) of acetic acid. How many millimoles of acetate (the conjugate base of acetic acid) will you need to add to this solution? The Pka of acetic acid is 4.74.
This molecule has a charge of n-. By changing the overall charge, n, from 1- to 2- to 3- we get three different polyatomic ions. For each of these ions a) identify the central atom and b) determine the formal charge of the central atom, X.
What would be the change in pressure in a sealed 10.0 L vessel due to the formation of N2 gas when the ammonium nitrite in 3.0 L of .700 M NH4NO2 decomposes
Calculate the pH of the solution after the addition of 100mL of 1.00 M HCL. the Ka for Hf is 3.5*10-4
A gas is compressed, during which 400 J of P-V work is done on the gas. At the same time, it absorbs 150 J of heat from the surroundings. What is the change, E, in the internal energy of the gas
Barium azide is 62.04% Ba and 37.96% N by mass. Assuming that barium exists as its most stable cation in the above compound, what is the molecular formula of barium azide, how many nitrogen atoms compose an azide ion, what is the charge on an azid..
Imagine a researcher allowed the paper chromatogram to develop for far longer than necessary in the mobile phase, such that the solvent front ran into the top edge of the paper and the spots continued to move.
a 1.50 l buffer solution is 0.250 m in hf and 0.250 m in naf. calculate the ph of the solution after the addition of
A gas is initially at 1.2 atm, 15.0 L, and O°C. What is the final pressure when the same amount of gas is heated to 10°C and the volume changed to 16.0 L
The Cl^- concentration in the water analysis given has been questioned. What concentration of Cl^- (mg/L) would make the cations and anions balance?
if a container of nitrogen, oxygen, carbon dioxide has a pressure of 2.00atm and the partial pressure of O2 is 312torr,
Consider a perfect gas with Cvm = 28.0 J/mol-K trapped in a piston/cylinder arrangement with cross-section area of 250.0 cm^2. The gas expands irreversibly against a fixed external pressure of 1.0 atm adiabatically
Calcium hydride reacts with water to give gaseous hydrogen and calcium hydroxide
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