QUESTIONS 1. Which of the following reactions are metathesis reactions? (a) 2KCi

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QUESTIONS 1. Which of the following reactions are metathesis reactions? (a) 2KCio,2KCI +302 (b) Cu(NO3)2+Zn- Cu + Zn(NO3 )2 (c) Baco, + 2HCI- BaCl2 + H20+CO2 Na2co, +Cuso, Na2SO4+Cuco, handbook or the Internet and cite your source. Ce(lO)4 RaSO P(NO) (NH)2Seo (d) 2a. How many grams of each of the following substances will dissolve in 100 mL of cold water? Consult a 2b. Which of these substances is least soluble on a gram-per-100 mL basis? 3. Suppose you have a solution that might contain any or all of the following cations: Cu*, Agt, Ba?, and Mn3. The adition of HBr causes a precipitate to form. After the precipitate is filtered off, H,so, is to the supernate, and another precipitate forms. This precipitate is filtered off, and a solution of NaOH is added to the supernatant liquid until it is strongly alkaline. No precipitate is formed. Which ions are present in each of the precipitates? Which cations are not present in the original solution? 4. Write balanced net ionic equations for the reactions, if any, that occur between (a) Fe,S,(a) and HBr(ag), (b) K,cO,(ay) and Cu(NO,) oap),(e) Fe(NO,)y (ap) and HCK(ap), and (d) Bi(OH),(6) and HNO,(ag).

Explanation / Answer

1. The answer is d.

Metathesis reactions are double displacement reactions i.e., the positive and negative ions present in the reactant appear to exchange partners. Option a shows a decomposition of KClO3, b shows diplacement of copper by zinc and c is an example of oxidation reduction reaction.

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