Posted by chips ahoy on Monday, April 11, 2011 at 5:01am.
One handbook lists a value pKb= 9.5 for of quinoline,C9H7N , a weak base used as a preservative for anatomical specimens and to make dyes. Another handbook lists the solubility of quinoline in water at 25degree celsius as 0.6g/100mL.
calculate the pH of a saturated solution of quinoline in water.

chemistry  DrBob222, Monday, April 11, 2011 at 2:32pm
C9H7N + H2O ==> C9H7NH^+ + OH^
Set up an ICE chart and solve for OH^ after converting pKb to Kb. You will need the concn C9H7N which can be obtained from the solubility. If solubility is 0.6g/100 mL, that means 6g/L so convert 6g to moles (moles = grams/molar mass).
Finally, convert OH^ to pOH, then to pH. Post your work if you get stuck.
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