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The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.8. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.75 M B(aq) with 0.75 M HCl(aq).
c)after addition of 50.0 mL of HCl
"A mixture of CH4 and H2O is passed over a nickel catalyst at 100 degrees K. The emerging gas is collected in a 5.00-L flask is found to contain 8.62g of CO, 2.60 g of h2, 43.0 g of CH4, and 48.4 g of H2O.
Explain, in detail, how you would prepare this solution so a labmate could prepare it from your instructions
Explain the following observations. 1. Aziridines, compounds that contain nitrogen in a three-membered ring, undergo pyramidal inversion much more slowly than do other alkylamines
If composite, define each simple sub-system and the internal restraint. If the vessel is shaken vigorously. Is the system then a simple or composite system?
Perform whatever separations and tests you think necessary to determine which ions are in fact present
Calculating the molecular formula of an organic compound. Worked example, using fundamental formula and balanced equations.
How many milliliters of 0.200 M NaOH will be required to titrate 14.5 mL of 0.479 M H2SO4?
if 836.8 Joules are added to 25 grams ammonia at 37 degrees Celsius, what will the final temperature be?
During a strenuous workout, an athlete generates 1950.0kJ of heat energy. What mass of water would have to evaporate from the athlete's skin to dissipate this much heat?
How much antifreeze would you add to a 2.0 gal water tank in order to obtain a solution that freezes
What mass of this substance must evaporate in order to freeze 230 of water initially at 24? (The heat of fusion of water is 334 the specific heat of water is 4.18 .)
Devise tests which allow you to distinguish between the ions in each case.
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