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Calculate the pH of each of the following strong acid solutions. (a) 0.000625 M HIO4 pH = (b) 0.869 g of HBrO4 in 22.0 L of solution pH = (c) 50.0 mL of 8.10 M H2SO4 diluted to 3.50 L pH = (d) a mix
Calculate pFe2 at each of the following points in the titration of 25.00 mL of 0.02138 M Fe2 by 0.03645 M EDTA at a 7.00 pH: a) 11.00 ml pFe2+ =? b) the equivalence point Ve pFe2+=? c) 20.00 ml pFe2
Give the conjugate acid of the following Bronsted-Lowry bases. (Type your answer using the format [OH]- for OH -.) (a) HAsO42- (b) F - (c) S2- (d) OH-
A gas mixture, with a total pressure of 300. torr, consists of equal masses of Ne (atomic weight 20.) and Ar (atomic weight 40.). What is the partial pressure of Ar, in torr
Calculate the % ionization in a 0.0902 M solution of acetylsalicylic acid (aspirin). The Ka of acetylsalicylic acid = 4 x 10-4. please show the steps to solving this type of problem.
Using values from Appendix C of your textbook, calculate the value of Keq at 298 K for each of the following reactions: (a) 2 Cl2(g) + 2 H2O(g) 4 HCl(g) + O2(g) Keq = . (b) 3 NO(g) NO2(g) + N2O(g) K
Determine the frequency, in hertz, of radiation having energy of 4.08×10?21 J/photon b. Determine the wavelength, in nanometers, of radiation with of 218 kj/mol energy
Consider the following gas-phase reaction: NO2(g) + N2O(g) 3 NO(g) Using data from Appendix C of your textbook calculate the temperature, To, at which this reaction will be at equilibrium under stan
Lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles.
Calculate H in kJ/mol KClO3 for the solution process. KClO3(s) K+(aq) + ClO3-(aq) The specific heat of water is 4.18 J/g-K.
What is the heat of combustion of the glucose expressed in kJ/mol C6H12O6? (1) +2.80x10^3 kJ (2) -2.80x10^3 kJ (3) -15.6 kJ (4) +65.4 kJ (5) -65.4 kJ The correct answer is B, however
In heating an organic compound strongly with metallic sodium, one frequently observes the formation of a blck material, which is insoluble in water
What is the pH of a buffer that results when 0.40 mol NaHCO2 is mixed with 100.0 mL of 2.00 M HCl and diluted with water to 250 mL (Ka of HCO2H=1.8*10^-4.
A mixture of Compound X and its enantiomer are placed in the polarimeter and the observed rotation is -5.1 degrees. Which enantiomer is in excess (+ or -)? Calculate the enantiometric
What is the enthalpy change for the reverse reaction. Hreverse = kJ/mol. (b) Balance the forward reaction with whole-number coefficients. What is H for the reaction represented by this equation? H =
Consider the reaction given below. H2(g) + F2(g) 2 HF(g) (a) Using thermodynamic data from the course website, calculate G° at 298 K. kJ (b) Calculate G at 298 K if the reaction mixture consists
Consider the reaction 2 NO2(g) N2O4(g) . (a) Using Gf N2O4(g) = 97.79 kJ/mol and Gf NO2(g) = 51.3 kJ/mol, calculate G° at 298 K. kJ (b) Calculate G at 298 K if the partial pressures of NO2 and N
Consider the reaction shown below. PbCO3(s) PbO(s) + CO2(g) Calculate the equilibrium pressure of CO2 in the system at the following temperatures. (a) 260°C atm (b) 500°C atm
Calculate the moles of hydrogen gas produced by the reaction of 0.848 g of aluminum with hydrochloric acid Thanks
Thiosulfate was used to mask the copper in a 20.00 mL aliquot. Titration of the lead and zinc in this aliquot required 34.06 mL of the EDTA solution.
A 50.0 mL sample containing Cd2 and Mn2 was treated with 69.6 mL of 0.0600 M EDTA. Titration of the excess unreacted EDTA required 11.9 mL of 0.0220 M Ca2
A 1.000-mL aliquot of a solution containing Cu2 and Ni2 is treated with 25.00 mL of a 0.04068 M EDTA solution. The solution is then back titrated with 0.02053 M Zn2 solution at a pH of 5
A buffer is to be prepared by adding solid sodium acetate to 0.10 M CH3COOH. Which of the following concentrations of sodium acetate will produce the most effective buffer
A 50.0-mL sample of 0.50 M HCl is titrated with 0.50 M NaOH. What is the pH of the solution after 28.0 mL of NaOH have been added to the acid
Which of the following indicators would be the best to use when 0.050 M benzoic acid (Ka = 6.6 × 10-5) is titrated with 0.05 M NaOH