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प्रश्न
Write balanced chemical equation for the following word equation.
Lead nitrate + Potassium iodide → Lead iodide + Potassium nitrate
Is this a double displacement reaction? Justify your answer. Name the compound precipitated and write the ions present in it.
उत्तर
The balanced chemical equation for the reaction between lead nitrate and potassium iodide is:
\[\ce{Pb(NO3)2(aq) + 2KI(aq)->PbI2(s) + 2KNO3(aq)}\]
This reaction is indeed a double displacement reaction, as it involves the exchange of ions between the two reacting compounds. In a double displacement reaction, the anions and cations of two different reactants switch places, forming two new compounds. Here, the nitrate ions (NO3−) from lead nitrate switch places with the iodide ions (I−) from potassium iodide, resulting in the formation of lead iodide (PbI2) and potassium nitrate (KNO3). The compound that precipitates (forms a solid) in this reaction is lead iodide (PbI2), and the ions present in it are lead ions (Pb2+) and iodide ions (I−).
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संबंधित प्रश्न
Give an example of a double displacement reaction other than the one given in the following Activity.
•Take about 3 mL of sodium sulphate
solution in a test tube.
• In another test tube, take about 3 mL of
barium chloride solution.
• Mix the two solutions given in the following fig.
• What do you observe?
What is the difference between displacement and double displacement reactions? Write equations for these reactions.
Give two characteristics of the chemical reaction which occurs on adding potassium iodide solution to lead nitrate solution.
What type of reaction is represented by the following equation?
CuSO4 + 2NaOH → Cu(OH)2 + Na2SO4
Explain the following type of chemical reaction, giving two examples for it:
Double displacement reaction
Which of the following represents a precipitation reaction?
Which among the following is (are) double displacement reaction(s)?
(i) \[\ce{Pb + CuCl -> PbCl2 + Cu}\]
(ii) \[\ce{Na2SO4 + BaCl2 -> BaSO4 + 2NaCl}\]
(iii) \[\ce{C + O2 -> CO2}\]
(iv) \[\ce{CH4 + 2O2 -> CO2 + 2H2O}\]
Barium chloride on reacting with ammonium sulphate forms barium sulphate and ammonium chloride. Which of the following correctly represents the type of reaction involved?
(i) Displacement reaction
(ii) Precipitation reaction
(iii) Combination reaction
(iv) Double displacement reaction
In the double displacement reaction between aqueous potassium iodide and aqueous lead nitrate, a yellow precipitate of lead iodide is formed. While performing the activity if lead nitrate is not available, which of the following can be used in place of lead nitrate?
Add potassium chromate (K2CrO4) into the solution of barium sulphate (BaSO4).
- What was the colour of the precipitate formed? Also, write the name of the precipitate.
- Write down the balanced equation for this reaction.
- Will you call this reaction a displacement reaction or a double displacement reaction? Why?
