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The pKb values for the dibasic base B are pKb1 = 2.1 and pKb2 = 7.5. Calculate the pH at each of the following points in the titration of 50.0 mL of a 0.95 M B(aq) with 0.95 M HCl(aq).
(a) before addition of any HCl (b) after addition of 25.0 mL of HCl (c) after addition of 50.0 mL of HCl (d) after addition of 75.0 mL of HCl (e) after addition of 100.0 mL of HCl
Gas ammonia can be decomposed to give 3.00 by mass of hydrogen and 14.0 by mass of nitrogen.what mass of nitrogen is obtained.
determine all the octahedral and tetrahedral d-counts for which Jahn-Teller distortions are possible. Give examples of metals that might commonly exhibit these d-counts and geometries. Differentiate between low and high spin cases for octahedral g..
How long would it take for 1.50 mol of water at 100.0 0C to be converted completely into steam if heat were added at a constant rate of 19.0 J/s?
Calculate the de Broglie wavelength of a neutron moving at 1.17% of the speed of light. _____m
When 27 mL of a 230 mL stock solution containing 2.2 M BaF2 is diluted to 81 mL, what is the concentration of F- in the new solution?
An appropriate indicator is used. Ka for acetic acid is 1.7x10^-5. Calculate the pH in the flask after 300 mL of 0.100 M NaOH has been added
Calculate the pH during the titration of 50.00 ml of 0.0500 M NaOH with 0.1000 M CH3CO2H after the addition of the following volumes
a titration curve for H3PO4 (triprotic acid) and a mixture of three weak acids?
How much heat is required to vaporize 25.5 g of water at 100 C? The heat of vaporization of water at 100 C is 40.7 rm kJ/mole.
The heat of solution of ammonium chloride is 15.2 kJ/mol. If a 6.323 g sample of NH4Cl is added to 65.0 mL of water in a calorimeter at 24.5°C, what is the minimum temperature reached by the solution?
A 1.0-L buffer solution is 0.105M in HNO 2 and 0.145M in NaNO 2. Determine the concentrations of HNO 2 and NaNO 2 after addition of 1.4g NaOH.
A sample of ethanol (C2H5OH) has a mass of 38.6 g. How many carbon atoms does the sample contain?
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