A `0.25M` solution of pyridinium chloride `(C_(5)H_(5)overset(o+)NHCl^(Theta))` has `pH` of `2.89`. Calculate `pK_(b)` for pyridine `(C_(5)H_(5)N)`.

A 0.25 M solution of pyridinium chloride C_(5)H_(5)NH^(+)Cl^(-) was found to have a pH of 2.75 What is K_(b) for pyridine, C_(5)H_(5)N ?

Equilibrium constant for the following reaction is 1xx10^(-9) : C_(5)H_(5)N(aq.)+H_(2)O(l)hArrC_(5)H_(5)NH^(+)(aq.)+OH^(-)(aq.) Determine the moles of pyridinium chloride (C_(5)H_(5)N.HCL) is added to 500ml of 0.4M of pyridine (C_(5)H_(5)N) obtain a buffer solution of pH=5 :

A 0.02 M solution of pyridinium hydrochloride has pH=3.44 . Calculate the ionization constant of pyridine.

The percentage of pyridine (C_(5)H_(5)N) that forms pyridinium ion (C_(5)H_(5)N^(+)H) in a 0.10 M aqueous pyridine solution ( K_(b) for C_(5)H_(5)N=1.7xx10^(-9) ) is

0.15 mole of pyridinium chloride has been added into 500 cm^(3) of 0.2M pyridine solution. Calculate pH and hydroxyl ion contration in the resulting solution, assuming no change in volume. (K_(b)"for pyridine" = 1.5xx10^(-9)M)

Calculate [H^(o+)], [C_(3)H_(5)O_(3)^(Θ)] , and [PhO^(Θ)] in a solution that is 0.03M (C_(2)H_(5)overset(O)overset(||)(C)-O-O-H) and 0.1MPhOH? K_(a) values for C_(3)H_(5)O_(3)H and PhOH are 1.48 xx 10^(-4) and 1.05 xx 10^(-10) respectively.

C_(2)H_(5)-O-C_(2)H_(5)overset("hot and conc." HBr)rarr ?+? Product is

Identify A and B in each of the following processes : (i) CH_(3)CH_(2) overset(NaCN) to A underset(Ni//H_(2)) overset("reduction") to B (ii) C_(6)H_(5)NH_(2)overset(NaNO_(2))toAunderset(OH^(-))overset(C_(6)H_(5)NH_(2)) to B