What do we call a reaction of the form #AB+CD rarr AC+BD#? What occurs when potassium iodide and lead nitrate react?
This type of reaction is called a double replacement reaction, a double displacement reaction, and a precipitation reaction.
The reaction between potassium iodide and lead nitrate in which a yellow solid (precipitate) forms has several names: double replacement, double displacement, and precipitation reaction.
In this type of reaction, the cations and anions in the reactants trade places, forming a precipitate.
For this reaction specifically, the equation is the following:
The student has performed a
You know the drill: solubility follows a hierarchy. All nitrates and acetates are soluble. All halides are soluble, EXCEPT for
We can represent the metathesis reaction that occurred in the test tube by the equation:
As a net ionic equation, (the potassium and nitrate ions are along for the ride):