the supply of bromine comes from sea water. which substance can be used to extract bromide ions from sea…

the supply of bromine comes from sea water. which substance can be used to extract bromide ions from sea water? select one: a. solid silver b. chlorine gas c. solid copper (i) chloride d. aqueous lead (ii) nitrate

the supply of bromine comes from sea water. which substance can be used to extract bromide ions from sea water? select one: a. solid silver b. chlorine gas c. solid copper (i) chloride d. aqueous lead (ii) nitrate

Answer

Explanation:

Step1: Analyze the reactivity of substances

Chlorine gas ((Cl_{2})) is more reactive than bromine. According to the principle of halogen displacement reaction.

Step2: Write the chemical reaction equation

The reaction between chlorine gas and bromide ions ((Br^{-})) in seawater is (Cl_{2}+2Br^{-}=2Cl^{-}+Br_{2}). Chlorine can oxidize bromide ions to bromine.

  • Solid silver ((Ag)): Silver is less reactive than bromine in terms of this kind of redox reaction for extracting bromide ions. Silver mainly forms insoluble silver bromide ((AgBr)) with bromide ions in a precipitation reaction rather than an extraction - type redox reaction.
  • Solid copper (I) chloride ((CuCl)): Copper (I) chloride has no oxidizing property to oxidize bromide ions to bromine.
  • Aqueous lead (II) nitrate ((Pb(NO_{3}){2})): Lead (II) nitrate will form insoluble lead bromide ((PbBr{2})) with bromide ions in a precipitation reaction, not an extraction reaction to get bromine.

Answer:

B. chlorine gas