Lead Chloride Precipitation

Pb(NO₃)₂ + 2NaCl → PbCl₂↓ + 2NaNO₃

Aperçu

Lead nitrate reacts with sodium chloride to form a white precipitate of lead chloride (Ksp = 1.7 × 10⁻⁵). PbCl₂ is moderately insoluble at room temperature but becomes quite soluble in hot water, distinguishing it from AgCl. The precipitate consists of fine needle-like crystals.

Participants

Rôle	Substance	Coefficient	État
Réactif	Sodium Chloride NaCl	2	(aq)
Produit	Sodium Nitrate NaNO₃	2	(aq)

Exemple du quotidien

In qualitative analysis, PbCl₂ is separated from AgCl and Hg₂Cl₂ by dissolving it in hot water, a key step in Group I cation analysis.

Importance industrielle

Lead chloride precipitation is important in lead recycling processes and in understanding lead contamination behavior in water treatment.

Propriétés

Type: Precipitation
Réversible: Non
Énergie: Exothermique
ΔH: -14,0 kJ/mol

Réactions associées

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

Frequently Asked Questions

What is the equation for Lead Chloride Precipitation?

The balanced equation is: Pb(NO₃)₂ + 2NaCl → PbCl₂↓ + 2NaNO₃.

What type of reaction is Lead Chloride Precipitation?

Lead Chloride Precipitation is a precipitation reaction.

Is Lead Chloride Precipitation exothermic or endothermic?

Lead Chloride Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -14.0 kJ/mol.