Precipitant explore blog

A precipitate is formed from a liquid solution, but is initially a insoluble solid, which means it does not dissolve. It is also typically ionic. Temperature plays a major role in what makes a precipitate. For example, lowering the temperature can form a precipitate. In our lab, we observed that salt, being a solute, allows for the temperature to be lowered, however it does become a solid precipitate.

An aqueous solution is where the solvent is water. The anions and the cations are combined to form a insoluble ionic solid called a precipitate. A method that we use to identify whether this occurs are called solubility rules since not all aqueous reactions form precipitates.

The solubility rules are
1.  NO3- : Nitrate's are ALWAYS soluble
2. Alkali metals are ALWAYS soluble
3. Ammonium  is ALWAYS soluble
In the lab, the precipitates that were formed were CuSo4, FeCl3, Pb (NO3)2, and AgNo3.
Non- precipitates were CaCl2, HNO3, NaCO3, and NH3. Evidence that also supports that Nitrate's are always soluble is that Pb (NO3) produced a precipitate when combined with the other chemicals the majority of the time. Evidence that supports that Alkali metals are always soluble is that KI produced a precipitate with other chemicals. The evidence that proves that ammomium is always soluble is that NH3 (aq)+H(aq)=NH4 (aq) .