Reactions of Ions in Solutions

Net Ionic EquationsNaOH CuCl2

Na+

Cl- Cu+2Cl-

Cl-

Dissolved in a solution the

ionic compound breaks down into it’s ions

What is a net ionic equation?

•a way of representing a balanced chemical equation by writing only those ions (dissociated in solution) that actually participated in the reaction creating a solid precipitate. (usually double displacement reactions)

•The ions that didn’t actually react are called spectator ions and are cancelled out on both sides of the equation

•Spectator ions: ions that are not involved in a chemical reaction

Steps for writing net ionic equations•1. Write the balanced chemical

equation with full chemical formulas for all reactants and products

•2. Using the solubility information, such as the table you’ve already been provided, rewrite the formulas for all high solubility ionic compounds as dissociated ions, to show the total ionic equation

Steps for writing net ionic equations

•3. Cancel out the spectator ions

•4. Write the net ionic equation, reducing coefficients if necessary

I want to mix the two solutions, Sodium Hydroxide (NaOH) and Copper (II) Chloride

(CuCl2).

OverallReaction

2NaOH(aq) + CuCl2 (aq) ----> 2NaCl (aq) + Cu(OH)2 (s)

PrecipitateSoluble insoluble

I want to mix the two solutions, Sodium Hydroxide (NaOH) and Copper (II) Chloride

(CuCl2).Complete

IonicReaction

remove those spectators2Na+ +2OH- + Cu+2 +2Cl - ----> 2Na+ +2Cl- +

Cu(OH)2 (s)

2Na+ +OH- + Cu+2 +2Cl - ----> 2Na+ +2Cl- + Cu(OH)2 (s)

I want to mix the two solutions, Sodium Hydroxide (NaOH) and Copper (II) Chloride

(CuCl2).

Net IonicReaction

2OH- + Cu+2 ----> Cu(OH)2 (s)

Aqueous solution of aluminum chloride & sodium hydroxide react to form solid

aluminum hydroxide

A zinc strip is dipped into an aqueous solution of silver nitrate.

Write a net ionic equation