Which product is most likely to be observed when mixing a 1.0 M solution of silver nitrate (AgNO3) and a 1.0 M solution of potassium dichromate...

This is an example of a precipitation reaction. A precipitation reaction is one where two aqueous solutions react to produce a precipitate. A precipitate is an insoluble solid that emerges from a liquid solution. A precipitation reaction can also be classified as a double replacement reaction.

We can predict which product in a precipitation reaction will be insoluble by consulting a list of solubility rules. You can find a list of solubility rules online or in your textbook.

The two products of the reaction are potassium nitrate (`~KNO_3` ) and silver dichromate (`~Ag_2Cr_2O_7` ). 

The solubility rules for nitrates and chromates are as follows:

• 
  Nitrates: Nitrates are always soluble.


• 
  Chromates: Chromates are usually insoluble.

Therefore, we would predict that silver dichromate is insolule and forms the solid precipitate seen at the bottom of the mixing vial.