A petri dish is filled with a small amount of water. Potassium Iodide is added to the petri dish in one end, and Lead Nitrate in the other end. As the two salts diffuse, Lead Iodide is precipitated as a “barrier” surrounding the place where the Lead Nitrate was placed. This is because of a [...]
This General Chemistry lecture covers the selective precipitation of ionic salts as a result of adding acids, bases or common ions to solution. We discuss the effects of pH on the solubility of hydroxide salts, as well as salts that contain other bases such as carbonate anion. We discuss how to calculate the [...]
In this video, we form 19 precipitates with various chemicals. A precipitate is formed when 2 soluble reactants react to form a soluble product and an insoluble product, which is “precipitated out.” Some of the precipitates seen in this video are quite original, such as the lead chromate and silver phosphate.
Duration : 0:8:22
This video shows the precipitate of Lead (II) Iodide, it is considered the Golden Rain due to the nature of the precipitate and its color.
Duration : 0:0:23
Barium chromate precipitates from the alkaline dichromate solution.
Duration : 0:1:38
Nuffield A level chemistry Practical
A selection of precipitation reactions using Sodium Carbonate (unless otherwise specified).
A precipitation reaction is a reaction in which soluble ions in separate solutions are mixed together to form an insoluble compound that settles out of solution as a solid. That insoluble compound is called a precipitate.
Duration : 0:2:53
The average temperature of Earth is approximately 15 degrees Celsius, which is about 59 degrees Fahrenheit. Average Earth temperatures are calculated from temperatures taken from all over the planet at different times. Find out how Earth’s average temperature appears to be on the rise with information from a science teacher in this free video on [...]
