Soluble salts

Moderators: Chem_Mod, Chem_Admin

Rebekah_Park_2C
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Soluble salts

Postby Rebekah_Park_2C » Mon Nov 30, 2015 1:06 pm

Why are salts soluble? What in its make-up allows it to dissolve in water?

Albert Chong_1L
Posts: 77
Joined: Fri Sep 25, 2015 3:00 am

Re: Soluble salts

Postby Albert Chong_1L » Mon Nov 30, 2015 1:19 pm

By definition, a salt is an ionic compound. Thus, its component atoms/molecules are necessarily charged (either positive of negative).
When these charged components interact with a polar medium such as water, the ionic components are pulled away from each other.

A salt dissolves when the positive end of a water molecule (H end) pulls the negatively charged component off an ionic compound/ salt, for example the negatively charged Cl- in NaCl.
On the other hand, the negative end of a water molecule (O end) pulls the positively charged component off an ionic compound/ salt, for example the positively charged Na+ in NaCl.

Thus, the attraction of opposite charges causes salts to dissolve.


Return to “Identifying Acidic & Basic Salts”

Who is online

Users browsing this forum: No registered users and 1 guest