The student placed 10 mL of PbCl2 (saturated solution) in the test tube and added a pinch of NaCl. A white precipitate of PbCl2 formed. How will this affect the concentration of Pb+2?

PbCl₂ (aq) → Pb²⁺ (aq) + 2Cl⁻ (aq)

NaCl (aq) → Na⁺ (aq) + Cl⁻ (aq)

Pb²⁺ (aq) + 2Cl⁻ (aq) ⇄ PbCl₂ (s)

At increase the concentration of chloride ions - concentration of lead ions decreases, the lead chloride is formed.