PH of a 0.1 M solution of KI?

Question

Would the pH be 10, 4, 7, or 1?

I picked one first doing -log(0.1), and then thought KI just dissociates into its ions and produces the neutral solution

Answer 1

KI is the salt of hydroiodic acid..a strong acid.Because HI is a strong acid its conjugate base I^-1 is a very weak base and cannot hydrolyze in water ( it cannot compete with OH^-1 for protons so it cannot strip a proton from water to produce a basic solution ) The pH should be 7

Answer 2

KI is a neutral salt so pH = 7

Answer 3

HI + KOH ~~> H2O + KI

KI is a salt made from the conjugates of HI (a strong acid) and KOH (a strong base). A salt made from the conjugates of a strong acid and a strong base turns out to have a pH of 7 since the conjugates are very weak and barely dissociate to any extent.