Silver Chloride Precipitation

AgNO3 + NaCl → AgCl↓ + NaNO3

ภาพรวม

Silver nitrate reacts with sodium chloride to form a white curdy precipitate of silver chloride. AgCl has a very low Ksp of 1.8 × 10⁻¹⁰, making it essentially insoluble. The precipitate turns purple in light due to photodecomposition of AgCl to silver metal and chlorine. This is the basis of the chloride ion test.

ผู้เข้าร่วม

บทบาท สาร สัมประสิทธิ์ สถานะ
สารตั้งต้น Silver Nitrate AgNO₃ 1 (aq)
สารตั้งต้น Sodium Chloride NaCl 1 (aq)
ผลิตภัณฑ์ Silver Chloride AgCl 1 (s)
ผลิตภัณฑ์ Sodium Nitrate NaNO₃ 1 (aq)

ตัวอย่างในชีวิตประจำวัน

The silver chloride test for chloride ions in water is one of the first qualitative analysis tests taught in chemistry courses.

ความสำคัญทางอุตสาหกรรม

AgCl precipitation is used in water quality testing, photography (historical), and in the preparation of silver chloride electrodes for electrochemistry.

Frequently Asked Questions

What is the equation for Silver Chloride Precipitation?
The balanced equation is: AgNO₃ + NaCl → AgCl↓ + NaNO₃.
What type of reaction is Silver Chloride Precipitation?
Silver Chloride Precipitation is a precipitation reaction.
Is Silver Chloride Precipitation exothermic or endothermic?
Silver Chloride Precipitation is exothermic (releases energy). The enthalpy change (ΔH) is -65.5 kJ/mol.