Solubility of Silver Iodide and Artificial Rainfall

We can learn about compounds, such as solubility of silver iodide.

Silver iodide is a relatively insoluble substance because it has a very small solubility product constant... However, if it is placed in a sodium sulfide solution, the solubility of silver iodide increases.

What can silver iodide be used for?

Due to the specificity of the solubility of silver iodide, silver iodide can be used for artificial rainfall, artificial snowfall, artificial cloud elimination, lightning elimination, weakening typhoons, hail suppression, etc. The use of silver iodide to catalyze rainfall does not require an airplane, and its equipment is simple, the dosage is small, and the cost is low, so it is possible to promote a large area.

Silver iodide and silver bromide are mixed to make photographic photographic emulsions. In artificial rainfall, it is used as an ice nucleus forming agent; it also protects against hail, frost, snow and storms. Used as a raw material for thermoelectric cells. It is used as a catalyst in chemical reactions and in the pharmaceutical industry.

The principle of silver iodide for artificial rainfall is that when silver iodide is heated, very fine silver iodide particles are formed in the air. The role of silver iodide in artificial rainfall is called cold cloud catalysis in meteorology. 1g of silver iodide can form tens of trillions of particles. These particles move into the clouds with the airflow and produce trillions to tens of billions of ice crystals in the cold clouds. Therefore, the use of silver iodide to catalyze rainfall does not require an airplane, the equipment is simple, the dosage is small, the cost is low, and it can be promoted on a large scale. In addition to artificial rainfall, silver iodide can also be used to artificially eliminate clouds and fog, eliminate lightning, weaken typhoons and suppress hail.

The main catalyst for artificial snow increase is silver iodide. The principle is to achieve snowfall by dispersing silver iodide in low and medium cloud systems where the cloud thickness is relatively large. Silver iodide can increase the number of condensation nuclei in the clouds, enhance the churning and convection in the clouds, and favor the collision of water vapor particles to increase, when the updraft in the air can not withstand the floating of water vapor particles, then the snowfall is produced.

Artificial snow is a physical change process, not a chemical change that produces new substances. Although the silver ions in silver iodide are heavy metals, the amount of silver iodide is extremely small and dispersed over a large area. The calculated catalyst released by silver iodide is only about one gram of silver iodide per square kilometer, and the concentration of silver ions is far below the international environmental quality standards for water, and the content per unit area is so negligible that it is almost negligible.

The silver iodide used in artificially influenced weather does not pollute. There are several main reasons for this.

The dose of silver iodide used is very small

We perform artificial rainfall by the chemical qualities of the solubility of silver iodide. Although silver iodide is a heavy metal element, the amount of silver iodide is very small and can be scattered over a large area, and the content per unit area is minimal. Therefore, the silver iodide used in artificial weather is not harmful to humans.

Small scope of artificially influenced weather operations

For example, when the original rainfall in Baoding, Cangzhou, Shijiazhuang and other places in Hebei eased the drought in some areas, a total of 160 rainfall rockets were launched and 114 silver iodide fume strips were burned, which is not used in ordinary circumstances. Therefore, the scope of artificial weather operations is small and does not affect the environment and human health at all.

Silver iodide is only a microphysical process

Although the silver iodide used in artificial weather is a chemical substance, artificial weather is a microphysical process, not a chemical change that produces new substances, so the dry ice, liquid nitrogen, silver iodide and other catalysts often used in artificial weather operations do not cause environmental pollution.

In summary: silver iodide used in artificial weather does not pollute because the dose of silver iodide used in artificial weather is very small and limited in scope, which will not affect the environment and human health. In addition to artificial rainfall, silver iodide can also be used for artificial snowfall, artificial cloud elimination, lightning elimination, typhoon weakening, hail suppression, etc.