Express your answer as a balanced net ionic equation. Identify all of the phases in your answer
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To express an answer as a balanced net ionic equation, we need to first write the balanced molecular equation and then proceed to write the net ionic equation by identifying the spectator ions.
First, let's take an example reaction of a double displacement reaction between sodium chloride (NaCl) and silver nitrate (AgNO3) in an aqueous solution.
The balanced molecular equation for this reaction is:
NaCl (aq) + AgNO3 (aq) → AgCl (s) + NaNO3 (aq)
In this equation, (aq) denotes the substances are dissolved in water and are in the form of aqueous solutions, while (s) represents the solid precipitate formed.
To write the net ionic equation, we need to remove the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the reaction.
In this case, the sodium ion (Na+) and the nitrate ion (NO3-) are spectator ions since they are present on both sides, so we can remove them from the equation.
The net ionic equation for this reaction is:
Ag+ (aq) + Cl- (aq) → AgCl (s)
In this net ionic equation, we only include the ions that are directly involved in the reaction, which are the silver ion (Ag+) and the chloride ion (Cl-).
Therefore, the balanced net ionic equation with identified phases is:
Ag+ (aq) + Cl- (aq) → AgCl (s)