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(a) To a 100 mL volumetric flask were added 4.80 g of sodium monohydrogenphosphate monohy-drate and 8.00 mL of a 6.00 M aqueous solution of hydrochloric acid, and the flask was filledto the calibration mark with water. What were the equilibrium concentrations of H3PO4,H2PO-, HPO-2, PO-3, and H+ in the resultant solution? Ka1 = 7.1x10-3, Ka2 = 6.3x10-8, and Ka3 = 4.2x10-13 for H3PO4.
(b) Is the resultant solution in Part a above a buffer solution?
the neutralization of HCL with NaOH at 25 degrees celsius is -79.9 kj/mol. Calculate the equilibrium constant for the reaction.
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A particular x-ray has a wavelength of 1.6 Å. Calculate the energy (in J) of one photon of this radiation. J
Calculate the pH of a 3.92×10^-3 M solution of H2SO4. (Ka = 0.0120 for HSO4-) 3-In a 4.66×10^-2 M solution, a monoprotic acid, is 20.4% dissociated. Calculate Ka for this acid
A hydrolysis reaction in which substrate is converted to products is catalyzed by an enzyme. the reaction was determined to have a Kcat of 10000 s^-1 and a standard free energy change of -13.8 kJ/mol. answer the following questions about experimen..
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Phosphorus pentachloride is used in the industrial preparation of organic phosphorus compounds. Equation 1 shows its preparation from PCl3 and Cl2. (1) PCl3(l) + Cl2(g) PCl5(s)
The average person burns 12000 kJ of food energy per day(2,800,000 cal.) If the heat of combustion of sugar is 4000 cal/g, and the heat of combustuio of fat is 9000 cal/g: How many grams of sugar must eat to get a day's supply of energy
What is the pH of 0.20 M NaCl 2. what is the pH of 0.20 M NH4NO3 3. What is the pH of 0.20 M NaCH3COO
what is the theorectical yield of disulfure chloride? what mass of the excess reactant reamains when the reaction is completed?
Calculate the concentrations of all species in a 0.700 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
What amount of H2 (in moles) is needed to inflate it to 1.0 atm in an ambient temperature of 25°C at sea level? mol. What mass can the balloon lift at sea level, where the density of air is 1.22 kg m-3? kg
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