Potassium displacing lead. Student adding potassium iodide solution (KI) to a test tube of lead (II) nitrate solution (Pb[NO3]2). The yellow precipita

---

Potassium displacing lead. Student adding potassium iodide solution (KI) to a test tube of lead (II) nitrate solution (Pb[NO3]2). The yellow precipitate of lead (II) iodide (PbI2) is formed because the potassium is more reactive than the lead and also because the formation of a solid drives the reaction in that direction. A solution of potassium nitrate (KNO3) forms in what is known as a double displacement (substitution) reaction. The equation for this reaction is: 2 KI + Pb(NO3)2 ----> 2 KNO3 + PbI2 Such experiments allow metals to be ranked within a reactivity series.

---

Size: 3257px × 4311px
Photo credit: © ANDREW LAMBERT PHOTOGRAPHY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 2, apparatus, aqueous, boy, chemical, chemicals, chemistry, child, class, classroom, demonstrating, demonstration, displacement, displacing, education, experiment, glassware, goggles, iodide, ki, laboratory, lead, learning, lesson, male, pbi2, potassium, precipitate, precipitating, precipitation, pupil, reaction, reactivity, safety, school, schoolboy, schoolchild, science, solid, solution, student, substituting, substitution, teenaged, teenager, test, transition, tube, understanding, uniform