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While an excess of Al2O3 is added to 174mL of 2.70M H2SO4, 45.2g Al2 (SO4)3 are isolated? Explain what is the % yield? Define how many moles of H2SO4 are needed if 100.0g of Al2(SO)3 are to be produced?
Balanced Equation:
Al2O3(s) + 3H2SO4(aq) > Al2(SO4)3(aq) + 3H20(l)
Explain in detail the observed absorption maxima (from the UV-vis spectrum) for the following compounds:
Calculate the pH of a buffer solution that contains 0.25 M benzoic acid (C6H5CO2H) and 0.15 M sodium benzoate (C6H5COONa). [Ka = 6.5 ? 10-5 for benzoic acid]
Find out the molar mass of each of the given gases 1) 2.16 grams of a gas that occupies 1.38L at 665 mmHg
how much energy is required to turn 500 g of ice at -15.0 celsius to liquid water at 55.0 celsius? specific heat (ice) = 2.10 J/g * C. Specific heat (water)= 4.18 J/g*C
Calculate pCu at the equivalence point in the titration of 20.0 mL of 0.0161 M CuSO4 with 0.0100 M EDTA at pH 8.00.
A solution is prepared by dissolving 13.3 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 11.50 mL sample of this stock solution
Calculate the mass of Sodium Nitrate required to prepare 50cm3 of 0.2 moll-1 solution.
What volume in mL is needed for the solution of HCl to react with a sample of Al 16.0? 2Al +6HCl => 2Al + 3H2. Calculate the molar concentration of ions in a 0.0200M solution is in Al(NO3)3
Calculate the maximum wavelength of light with sufficient energy to dissociate a diatomic chlorine molecule into chlorine radicals.
two solutions, a 0.1% (m/v) albumin solution and a 2% (m/v) albumin solution, are seperated by a semipermeable membrane. (Albumin is a colloid)
Explain why it is necessary to cinsider water vapor pressure in calculating the atomic mass of an unknown metal. Whould the calculated atomac mass be larger or smaller thatn the true value if water vapor pressure was ignored
What is the molar absorptivity of the unknown compound. What is the concentration of the compound in a solution, if the absorbance of the solution in a 1.00 cm cell at 520 nm is 0.320
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