Question

Match each of the substances with the expected pH of the resulting solution when they are added to neutral water. Determine if acidic, basic, or neutral.

HI
Cr(NO3)3
LiOH
KBr
NaF

Answer 1

To determine the expected pH of the resulting solution of the following substances, create a balanced chemical equation of their ionization in water:

HI

HI + H2O ---> H+ + I-

It completely dissociates into H+ and I-. Due to the presence of the Hydronium Ion, the solution is acidic.

KBr

KBr + H2O ----> HBr + KOH

The salt KBr is formed by a strong base and a weak acid, therefore, the solution it forms with water is basic.

LiOH

LiOH + H2O ----> Li+ + OH-

It dissociates completely in water, turns into Li+ and OH-. Due to the presence of Hydroxide Ion, the solution becomes basic.