When we mix lead (2) nitrate and potassium iodide, 1. What is the colo...
Lead nitrate = Pb[NO]₂ Potassium Iodide = KI
1. Colour of the precipitate formed is Yellow
2. KI + Pb[NO₃]₂ -----> KNO₃ + PbI₂ [Skeletal form of equation]
3. 2Kl+ Pb[NO₃]₂ -----> 2KNO₃ + PbI₂ [ Balanced equation]
4. Yes this is a double displacement reaction.
Also, as yellow precipitate is formed , this is also an example of precipitation reaction.
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When we mix lead (2) nitrate and potassium iodide, 1. What is the colo...
1. Colour of the precipitate formed and compound precipitated:
When lead(II) nitrate (Pb(NO3)2) and potassium iodide (KI) are mixed, a yellow precipitate is formed. The compound precipitated is lead(II) iodide (PbI2), which is insoluble in water and appears as a solid.
2. Balanced chemical equation:
The balanced chemical equation for the reaction between lead(II) nitrate and potassium iodide is as follows:
Pb(NO3)2 + 2KI → PbI2 + 2KNO3
3. Double displacement reaction:
Yes, this reaction is a double displacement reaction. In a double displacement reaction, the positive ions of two compounds switch places to form new compounds. In this case, the lead(II) ion (Pb2+) from lead(II) nitrate combines with the iodide ion (I-) from potassium iodide to form the precipitate lead(II) iodide. At the same time, the potassium ion (K+) from potassium iodide combines with the nitrate ion (NO3-) from lead(II) nitrate to form potassium nitrate, which remains dissolved in the solution.
During the reaction, the lead(II) nitrate and potassium iodide dissociate into their respective ions in the solution:
Pb(NO3)2 → Pb2+ + 2NO3-
2KI → 2K+ + 2I-
The positive ions (Pb2+ and K+) switch places:
Pb2+ + 2I- → PbI2 (yellow precipitate)
2K+ + 2NO3- → 2KNO3 (dissolved in the solution)
The formation of the yellow precipitate indicates the formation of lead(II) iodide, which is insoluble in water and appears as a solid. The potassium nitrate, on the other hand, remains dissolved in the solution as it is a soluble salt.
Overall, the reaction between lead(II) nitrate and potassium iodide is a double displacement reaction because the positive ions of the two compounds switch places to form new compounds.