Lead Chloride Precipitation

Pb(NO3)2 + 2NaCl → PbCl2↓ + 2NaNO3

ภาพรวม

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.

ผู้เข้าร่วม

บทบาท สาร สัมประสิทธิ์ สถานะ
สารตั้งต้น Sodium Chloride NaCl 2 (aq)
ผลิตภัณฑ์ Sodium Nitrate NaNO₃ 2 (aq)

ตัวอย่างในชีวิตประจำวัน

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

ความสำคัญทางอุตสาหกรรม

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

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.