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Question- As a technician in a large pharmaceutical research firm, you need to produce 200.mL of 1.00 M potassium phosphate buffer solution of pH = 6.94. The pKa of H2PO4 is 7.21. You have the following supplies: 2.00 L of 1.00 M KH2PO4 stock solution, 1.50 L of 1.00 M K2HPO4 stock solution, and a carboy of pure distilled H2O. How much 1.00 M KH2PO4 will you need to make this solution?
Please write answer for each section to receive points
An attempt at synthesizing a certain optically active compound resulted in a mixture of its enantiomers. The mixture had an observed specific rotation of +12.1 degree.
determine what is the observed rate for the given reaction 2 o3g -rarr 3 o2g has an empirically determined rate law
canned tuna was analyzed by the Kjeldahl method; 22.66ml of .1224M HCl were required to titrate the liberated ammonia. Calculate the percentage of nitrogen in the sample.
The flask was then shaken until the solution was uniform. A 20.0-rm mL sample of this glucose solution was diluted to 0.500 rm L. How many grams of glucose are in 100. rm mL of the final solution?
What volume of ammonia gas could be produced at 100% yield when 3.7 moles of hydrogen reacts with 1.3 moles of nitrogen
The tank is first evacuated, and then it is connected to a 50.0 L cylinder of compressed nitrogen gas. The gas pressure in the cylinder, originally at 21.5 atm, falls to 1.55 atm without a change in temperature. What is the volume of the tank?
Problem- 15.0 moles of gas are in a 3.00L tank at 21.8?C. Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are a=2.300L2?atm/mol2 and b=0.0430 L/mol.
What are the precipitation reaction with balanced molecular, total ionic and net ionic equations for na2
What is the specific heat capacity of a liquid if 450.0 kJ of heat caused 230.0 g of the liquid if temperature changed from 25°C to 28°C and state the reaction exothermic or endothermic
Radio station KLBJ broadcasts at a frequency of 93.7 × 106 s-1. Determine the length of the waves that corresponds to this frequency.
Which of the following has only a single peak in the proton NMR spectrum
If you used NaClO instead of CuSO4 in reactions other than the reaction with KI and Starch, would you expect the results to always be identical?
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