Silver Iodide Precipitation

AgNO3 + KI → AgI↓ + KNO3

概述

Silver nitrate reacts with potassium iodide to form a yellow precipitate of silver iodide (Ksp = 8.5 × 10⁻¹⁷). AgI is extremely insoluble and does not dissolve in ammonia, unlike AgCl and AgBr. Its crystal structure is similar to ice, making it an excellent cloud seeding agent.

参与者

角色 物质 系数 状态
反应物 Silver Nitrate AgNO₃ 1 (aq)
产物 Potassium Nitrate KNO₃ 1 (aq)

日常示例

Cloud seeding aircraft release silver iodide particles to induce rain, exploiting AgI's ice-like crystal structure that nucleates ice crystals.

工业重要性

碘化银用于人工降雨和消雾作业，为农业区和水资源紧缺地区提供增雨技术支持，是气象干预的重要手段。

属性

类型
Precipitation
可逆
否
能量
放热
ΔH
-110.0 kJ/mol

相关反应

Aluminum Hydroxide Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Magnesium Hydroxide Precipitation Copper Sulfide Precipitation Cobalt(II) Hydroxide Precipitation Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Silver Iodide Precipitation?
The balanced equation is: AgNO₃ + KI → AgI↓ + KNO₃.
What type of reaction is Silver Iodide Precipitation?
Silver Iodide Precipitation is a precipitation reaction.
Is Silver Iodide Precipitation exothermic or endothermic?
Silver Iodide Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -110.0 kJ/mol.