Saturday
December 20, 2014

Homework Help: chemistry

Posted by Fiona on Sunday, May 13, 2007 at 6:48am.

Why is a solution of KNO3 neutral and not acidic?

K^+ doesn't hydrolyze (H2O has a stronger attraction for the OH- than K^+) and NO3^- doesn't hydrolyze (H2O is a stronger base than NO3^- meaning that H2O will not donate a proton to NO3^-).
Looking at it another way, suppose it did, what would we get?
KNO3 + HOH ==> KOH + HNO3.
BUT KOH is a strong base and HNO3 is a strong acid and there is no driving force for the reaction to occur. Remember, three reasons for a reaction to go to completion:
1. gas is formed (neither is a gas).
2. ppt is formed (neither is a ppt).
3. slightly ionized substance is formed (neither is a weak electrolyte).
So, no reaction when KNO3 is placed in water, except for the crystal structure breaking and forming K^+(aq) and NO3^-(aq).

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - I can't find a substance apart of water with a pH of 7,so i have a ...
AP Chemistry - Consider the ionization constants cyanic acid (HOCN) : Ka= 3.510...
chemistry - Consider the ionization constants hypochlorous acid (HOCl) : Ka = 3....
Chemistry - Number these in order of ease of hydrolysis. 1= easiest to hydrolyze...
chemistry - A 355g sample of a saturated solution of KNO3(s) in water is ...
Honors Chemistry - Will a base + H2O ALWAYS from a basic solution? (not a ...
Chemistry - Please help me with this one... What is the oxidizing agent in the ...
Chemistry - To balance the oxygen and hydrogen for a redox reaction that takes ...
chemistry - Predict whether the following solutions are acidic, basic, or nearly...
Chemistry - When solutions of KCl and Pb(NO3)2 are mixed, a precipitate forms. ...

Search
Members