Table of Contents
What are the spectator ions in a net ionic equation?
A spectator ion is an ion that does not take part in the chemical reaction and is found in solution both before and after the reaction. In the above reaction, the sodium ion and the nitrate ion are both spectator ions. The equation can now be written without the spectator ions.
What is half cell equation?
Half-Cell Example The electrochemical reaction of a Daniell cell may be written as two half-cells. The original equation is: 2H+(aq) + 2e- → H2(g) The half-cells or half-reactions are: Zn → Zn2+ + 2e− (for the reaction at the anode or Zn)
What are the spectator ions in the reaction?
Spectator ions are ions that are present in a solution but don’t take part in a solution’s chemical reaction. When reactants dissociate into ions, some of the ions may combine to form a new compound. The other ions don’t take part in this chemical reaction and are therefore called spectator ions.
What is a net cell reaction?
Electrochemical Cell Reaction: An electrochemical cell uses the chemical energy of the spontaneous reaction and converts it into electrical energy which flows between the two half-cells. The net cell reaction is the sum of the two half-cell reactions occurring simultaneously.
What do you understand by half-cell and net cell reaction?
A galvanic cell or simple battery is made of two electrodes. Each of the electrodes of a galvanic cell is known as a half cell. In a battery, the two half cells form an oxidizing-reducing couple. When two half cells are connected via an electric conductor and salt bridge, an electrochemical reaction is started.
What is the cathode half reaction?
The cathode is where reduction takes place and electrons are gained. The half-reaction on the anode, where oxidation occurs, is Zn(s) = Zn2+ (aq) + (2e-). The zinc loses two electrons to form Zn2+. The half-reaction on the cathode where reduction occurs is Cu2+ (aq) + 2e- = Cu(s).
How do you write the net ionic equation with spectator ions?
The spectator ions are canceled out of a reaction when writing the net ionic equation, so the net ionic equation for this example would be: 2 Cl – (aq) + Cu 2+ (aq) → CuCl 2 (s) Although spectator ions are ignored in the net reaction, they affect the Debye length. Table of Common Spectator Ions
Which ions are the spectator ions in this reaction?
The sodium ions and sulfate ion are the spectator ions in this reaction. They appear unchanged in both the product and reactant side of the equation. These ions just ‘spectate’ while the other ions form the copper chloride. Although spectator ions are ignored in the net reaction, they affect the Debye length.
What is the net ionic equation for H+ OH-?
Removing the spectator ions yields the net ionic equation: H+ (aq) + OH- (aq) -> H2O (l) Again, the spectator ions are the ions present on both sides of the complete ionic equation, and are not included in the net ionic equation.
What is the net ionic equation for 2Cl + Cu2+?
The spectator ions are canceled out of a reaction when writing the net ionic equation, so the net ionic equation for this example would be: 2 Cl – (aq) + Cu 2+ (aq) → CuCl 2 (s)