An excess of aqueous AgNO3 reacts with

44.5 mL of 5 M K2CrO4(aq) to form a precip-
itate. What is the precipitate?
1. K2CrO4
2. KNO3
3. Ag2CrO4
4. AgNO3

http://www.files.chem.vt.edu/RVGS/ACT/notes/solubility_rules.html

Ag2CrO4

To determine the precipitate formed when an excess of aqueous AgNO3 reacts with 44.5 mL of 5 M K2CrO4(aq), we need to consider the chemical reaction between these two compounds.

The balanced chemical equation for the reaction between AgNO3 and K2CrO4 is:
2AgNO3 + K2CrO4 → Ag2CrO4 + 2KNO3

From the balanced equation, we can see that Ag2CrO4 is the precipitate formed.

Therefore, the correct answer is option 3. Ag2CrO4.