Lead nitrate and Sodium chloride Reaction | Pb(NO3)2 + NaCl

When aqueous Lead nitrate (Pb(NO3)2) and aqueous or solid Sodium chloride (HCl) are reacted, Lead chloride (PbCl2) precipitate and Sodium nitrate (NaNO3) are given as products. Lead chloride is a white precipitate and sodium chloride exists as an aqueous solution.

lead nitrate sodium chloride Pb(NO3)2 + NaCl

In this tutorial, we will discuss followings.

Solid lead nitrate and aqueous sodium chloride reaction

In aqueous sodium chloride solution, there are Na+ cations and Cl- anions. When solid lead nitrate is added to aqueous sodium chloride solution, lead nitrate is dissociated to Pb2+ cations and NO3- anions because lead nitrate is soluble in water.

Pb(NO3)2(s) → Pb2+(aq) + NO3-(aq)

When concentrations of Pb2+ cations' and Cl- anions are enough to form PbCl2 precipitate, you will see the formation of white precipitate.

Stoichiometric balanced reaction of Pb(NO3)2 and NaCl

Pb(NO3)2(aq) + 2NaCl(aq) → PbCl2(aq) + 2NaNO3(aq)

According to the above balanced equation, one lead chloride mol reacts with two sodium chloride moles and gives one mol of lead chloride and two moles of sodium nitrate.

Aqueous lead nitrate and solid sodium chloride reaction

Sodium chloride is highly soluble in water and readily dissociates to Na+ cations and Cl- anions in aqueous medium. So, when solid sodium chloride is added to aqueous lead nitrate solution, solid soium chloride dissociates as mentioned here.

NaCl(s) → Na+(aq) + Cl-(aq)

Again, if concentrations of Pb2+ cations' and Cl- anions are enough to form PbCl2 precipitate, you will see the formation of white precipitate. You can check the possibility of forming the PbCl2 precipitate by doing a Ksp calculation or checking the solubility of inorganic compounds.

Change of oxidation numbers

This reaction is not a redox reaction because oxidation numbers of atoms are not changed during the reaction process.

  • In both Pb(NO3)2 and PbCl2, lead is at +2 oxidation state.
  • Chlorine's oxidation number in NaCl is -1. And also, on PbCl2, oxidation number of chlorine is -1.

Physical and chemical observation of Pb(NO3)2 and NaCl reaction

Here, we will see some physical observations and chemical properties changes during the reaction. These observations are important to identify compounds from other compounds in the qualitative analysis.

Colour changes

  • Both lead nitrate and sodium chloride acid are colourless aqueous solutions.
  • You will see a white precipitate is formed because lead chloride is produced. But, other product sodium nitrate is a colourless aqueous solution.

Safety and health hazards possible due to this reaction

  • Because lead is a heavy metal, you should be extremely careful in handling lead containing solutions.


Are there any gas release when lead nitrate reacts with sodium chloride?

When aqueous lead nitrate reacts with sodium chloride, a precipitate (PbCl2), a water soluble salt (NaNO3) and water are given. So, no any gaseous product is formed in this reaction.

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Related tutorials to sodium chloride (NaCl)