Calcium Fluoride Precipitation (Fluorite)

CaCl2 + 2NaF → CaF2↓ + 2NaCl

概述

Calcium chloride reacts with sodium fluoride to precipitate calcium fluoride (Ksp = 3.5 × 10⁻¹¹). CaF₂ occurs naturally as the mineral fluorite (fluorspar), which gives fluorescence its name because fluorite was the first substance observed to fluoresce under UV light.

参与者

角色 物质 系数 状态
产物 Calcium Fluoride CaF₂ 1 (s)
产物 Sodium Chloride NaCl 2 (aq)

日常示例

Fluorite crystals glow blue or green under UV light, which is why we call this phenomenon fluorescence, named after this mineral.

工业重要性

萤石是氟化学品的主要来源。它用作炼钢助熔剂、氢氟酸的生产原料,以及光学元件。

属性

类型
Precipitation
可逆
否
能量
放热
ΔH
-18.0 kJ/mol

相关反应

Aluminum Hydroxide Precipitation Barium Carbonate Precipitation Barium Sulfate Precipitation Cadmium Sulfide Precipitation (Yellow) Calcium Phosphate Precipitation (Bone Mineral) Chromium(III) Hydroxide Precipitation Lead Carbonate Precipitation Lead Chloride Precipitation Calcium Carbonate Precipitation Iron(III) Hydroxide Precipitation

Frequently Asked Questions

What is the equation for Calcium Fluoride Precipitation (Fluorite)?
The balanced equation is: CaCl₂ + 2NaF → CaF₂↓ + 2NaCl.
What type of reaction is Calcium Fluoride Precipitation (Fluorite)?
Calcium Fluoride Precipitation (Fluorite) is a precipitation reaction.
Is Calcium Fluoride Precipitation (Fluorite) exothermic or endothermic?
Calcium Fluoride Precipitation (Fluorite) is exothermic (releases energy). The enthalpy change (ΔH) is -18.0 kJ/mol.