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?

\( \newcommand\) (Credit:F. S. Church, published in Harper's Weekly, January 17, 1874, p. 61; Source: Want to trade? The practice of barter (trading one thing for another) has been in existencefor a very longtime. In the illustration above, items like chickens were bartered for newspapers. You have something I want, and I have something you want. So we trade and we each have something new. Somechemicalreactionsare like that. Compounds swap parts and you have new materials. Double-Replacement Reactions A double-replacement reaction is a reaction in which the positive and negative ions of two ionic compounds exchange places to form two new compounds. The general form of a double-replacement (also called double-displacement) reaction is: \[\ce\) are negatively-charged anions. Double-replacement reactions generally occur between substances in aqueous solution. In order for a reaction to occur, one of the products is usually a solid precipitate, a gas, or a molecular compound such as water. Formation of a Precipitate A precipitate forms in a double-replacement reaction when the cations from one of the reactants combine with the anions from the other reactant to form an insoluble ionic compound. When aqueous solutions of potassium iodide and lead (II) nitrate are mixed, the following reaction occurs: \[2 \ce\): Formation of lead iodide precipitate. (Credit:Paige Powers - "Lead Iodide"; Source: Formation of a Gas Some double-replacement reactions produce a gaseous product which t...

The correct option is B Lead acetate Explanation for correct answer: Option B Lead acetate • When two compounds react, positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products is known as a double displacement reaction. • A double replacement reaction is represented by the general equation, AB + CD → AD + CB • In the double displacement reaction, Potassium Iodide ( KI ) and Lead nitrate ( Pb ( NO 3 ) 2 ​ ) dissociate in their aqueous states to form ions. • Thus Lead ( Pb 2 + ) ions combine with the Iodide ( I - ) ions to form precipitates of Lead iodide. • The Lead acetate dissociates in the aqueous state to form Pb 2 + ions and CH 3 COO - ions. • Thus, Potassium iodide combines with Lead acetate to form precipitates of Lead iodide and 2 KI ( aq ) Potassium iodide + Pb ( CH 3 COO ) 2 ( aq ) Lead acetate → PbI 2 ( s ) Lead iodide + 2 CH 3 COOK ( s ) Potassium acetate • Hence Option B is correct. Explanation for incorrect answer: Option A Lead sulphate (insoluble) • If Lead sulphate is used in place of lead nitrate, lead iodide won't get precipitated, since the lead sulphate is insoluble in water and it does not give Pb 2 + ions which can combine with I - to form PbI 2. • Hence Option A is incorrect. Option C Ammonium nitrate • If Ammonium nitrate is used in place of Ammonium nitrate, lead iodide won't get precipitated, since the Ammonium nitrate and Potassium iodide does not give Pb 2 + ions which c...

Anions of this group 3 cations do not reacteither with dilute hydrochloric acid, or with barium ions in neutral medium.However, they form precipitates with silver ions in dilute nitric acid medium.Anions of this group are chloride, bromide, iodide, and thiocyanate. Iodide canbe identified by formation of yellow color precipitate. However, this test isnot a confirmatory test.

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Take 5 mL of sodium sulphate solution in a test tube and 5 mL of barium chloride solution in another test tube. Mix the two solutions slowly and leave the test tube undisturbed for some time. A white precipitate is formed after some time. Which of the following statements is correct about the above 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? (A) Lead sulphate (insoluble) (B) Lead acetate (C) Ammonium nitrate (D) Potassium sulphate Answer In a double displacement reaction, the two reacting species exchange their positive and negative ions . In the reaction given above, lead nitrate can be replaced only by other salt of lead. Now, • Lead sulphate is insoluble in water , it will not produce ions and therefore, the reaction cannot be carried out. • Thus, we can use Lead Acetate So, another reaction can be