Net equations. Please help?

A. How do ionic compounds dissolve into ions?

B. Write the equation for the dissolution of the following in water,
Potassium Iodide

c. Write the equation for the dissolution of the following in water,
Magnesium bromide

1 Answer
Apr 27, 2018

By solvation in a polar solvent for one......water is excellent solvent of this type in that it is capable of solvating individual ions effectively.

Explanation:

We conceive that in a strongly polar solvent such as water, sodium chloride ionizes, and undergoes chemical reaction...

#NaCl(s) stackrel(H_2O)rarrNa^(+) + Cl^(-)#...

...each of the ions are solvated by four to six water molecules, and an ion-dipole complex of the form #[Na{(OH)_2}_6]^+# is the solution species.

And for potassium iodide we would write...

#KI(s) stackrel(H_2O)rarrK^+ + I^(-)#...the ions are present as their aquated ions.

And for magnesium bromide...

#MgBr_2(s) stackrel(H_2O)rarr Mg^(2+) + 2Br^(-)#

All of these reactions constitute examples of chemical change in that strong chemical bonds have been broken, and new substances have been formed....