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A- What is the pH of a buffer prepared by adding 0.809mol of the weak acid HA to 0.305mol of NaA in 2.00L of solution? The dissociation constant Ka of HA is 5.66 X 10^-7 B- What is the pH after 0.150mol of HCL is added to the buffer from Part A? Assume no volume change on the addition of the acid. C- What is the pH after 0.195mol of NaOH is added to the buffer from Part A? Assume no volume change on the addition of the base. Please answer A, B, C with 3 significant figures.
The evaporation of water H2O(l) ->H2O(g) is endothermic: Change in T degree +44.01 kJ Determine the minimum mass of water (in ) has to evaporate to absorb 183 joules of heat?
The following reaction equation depicts the reaction between hydrazine (N2H4) and dinitrogen textroxide (N2O4) to form diatomic nitrogen and water vapor.
At 373 K, Keq = 2.39 for the following reaction: SO2Cl2(g) = SO2(g) + Cl2(g) In an equilibrium mixture of the three gases, the partial pressures of SO2Cl2 and SO2 are 3.31 atm and 1.59 atm, respectively.
Sodium atoms(Na) emit light with a wavelength(λ) of 330 nano meters when an electron moves from a state of 4 p orbital to a state of 3 s orbital now you just need to determine the energy difference between the orbitals.
Initial Concentration of azomethane Initial rate Exp. 1 1.13 x 10-2 M 2.8 x 10-6 M/s Exp. 2 2.26 x 10-2 M 5.6 x 10-6 M/s
A sample of nitrosyl bromide (NOBr) decomposes according to the equation 2NOBr(g)-->2NO9g) +Br2 An equilibrium mixture in a 5.00- vessel at 100 degrees celsius contains
Draw the structure of phenylethyla amine and tell me what the CH3 and CH2 patterns in the HNMR
An 8 g of SO3 was placed in an evacuated container where it decomposed at 600 degrees Celsius. At equilibrium, the total pressure and density were 1.8 ATM and 1.6 g/L. Calculate constant pressure.
the normal boiling point of menthanol is 64.7 degrees celcius, and its molar enthalpy of vaporization is 71.8 kj/mol. Calculate the value of delta S when 1.00 mol of CH3OH (liquid) is vaporized at 64.7 degrees celcius.
a 0.050 molar solution of a weak monobasic (accepts one proton) substance, B has a pH of 10.98 Determine the ionization Constant Ka of this acid.
Write the equation of the cell reaction and indicate cathode and anode half-cells for the electrochemical cell formed from a Mg/Mg^2+ half-cell and In/In^3+ half-cell.
what will be the % yield after one crystallization step using the minimum amount of solvent A that is required for the crystallization step?
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