Calculate the pKb of a weak base BOH, which gives a pH of 10.5 when 0.01...
Caffeine (C8H10N4O2) is a weak base with a pKb of 10.4. Calculate the pH of a solution containing a caffeine concentration of 460 mg/L . Express your answer to one decimal place.
Amphetamine (C9H13N) is a weak base with a pKb of 4.2. Calculate the pH of a solution containing an amphetamine concentration of 240 mg/L . Express your answer to one decimal place.
3) a) What is the pKb for a weak base if the pH of a 0.125M solution of this weak base was found to be 8.16? 4) When a weak acid is added to water to make a 0.250M solution, the acid was found to be 1.5% ionized. What is the Ka and pKa of this weak acid? 5) At 60°C, Kw = 9.6x10-14 (Kw increases as the temperature increases). a) For pure water at 60°C, what is the [H+] and pH....
Amphetamine (C9H13N) is a weak base with a pKb of 4.2. Calculate the pH of a solution containing an amphetamine concentration of 230 mg/L . Express your answer to two decimal places.
Caffeine (C8H10N4O2) is a weak base with a pKb of 10.4. Calculate the pH of a solution containing a caffeine concentration of 156 mgL−1 . Express your answer to one decimal place.
1.The pH of a 2.65×10-3 M solution of a weak base is 9.17. Calculate pKb for this base to two decimal places. 2.Determine the mass (in g) of sodium butanoate (NaC3H7COO) that must be added to 78.9 mL of 0.609 M butanoic acid to yield a pH of 6.43. Report your answer to 3 significant figures. Assume the volume of the solution does not change and that the 5% approximation is valid.
Caffeine (C8H10N4O2) is a weak base with a pKb of 10.4. Part A Calculate the pH of a solution containing a caffeine concentration of 281 mgL−1 . Express your answer to one decimal place.
Consider the titration of 70.0 mL of 0.0300 M C6H5NH, (a weak base; Kb = 4.30e-10) with 0.100 M HIO4. Calculate the pH after the following volumes of titrant have been added: (a) 0.0 mL (b) 5.3 mL (c) 10.5 mL pH = pH = pH = (d) 15.8 ml (e) 21.0 mL (f) 23.1 ml pH = pH = pH =
Part A) Amphetamine (C9H13N) is a weak base with a pKb of 4.2. Calculate the pH of a solution containing an amphetamine concentration of 205 mg/L. Express your answer to two decimal places. Part B) Find the pH of a 0.150 M solution of a weak monoprotic acid having Ka= 0.20. Express your answer to two decimal places. B2) Find the percent dissociation of this solution. Express your answer using two significant figures.
Consider the titration of 30.0 mL of 0.0700 M (CH3)3N (a weak base; Kb = 6.400-05) with 0.100 M HBr. Calculate the pH after the following volumes of titrant have been added: (a) 0.0 mL (b) 5.3 mL (c) 10.5 mL pH = pH = pH = (d) 15.8 ml (e) 21.0 mL (f) 27.3 mL pH = pH = pH =