somethings wrong

Q what is the pH of a solution made by mixing 100 mL HCl and 200 mL aniline? Kb for aniline is 4.6 x 10^(-10)

One can solve this prob after realising a buffer is formed. The ans given in the book is 4.89 which is what we get by the usual method. But doest it sound strange? An acidic pH for an aniline solution!! I guess we need to account for the OH from the water. Could someone pls confirm

thanks