Question

types of reactions
classifying reactions-types of chemical reactions
ab + cd → ad + hc
agno₃(aq) + kbr(aq) → agbr(s) + kno₃(aq)
hcl(aq) + naoh(aq) → nacl(aq) + h₂o(l)
13 multiple - choice question
what is a double displacement reaction?
two bonded compound switch ions.
a single element replaces an ion in a compound.
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Explanation:

A double - displacement reaction is a type of chemical reaction where the cations and anions of two different ionic compounds exchange places. In the reaction \(AgNO_3(aq)+KBr(aq)\to AgBr(s)+KNO_3(aq)\), the \(Ag^+\) (from \(AgNO_3\)) and \(K^+\) (from \(KBr\)) cations exchange their anions (\(NO_3^-\) and \(Br^-\) respectively). The reaction \(HCl(aq)+NaOH(aq)\to NaCl(aq)+H_2O(l)\) is an acid - base neutralization reaction (a special case of double - displacement where \(H^+\) from acid and \(OH^-\) from base combine to form water). The general form \(AB + CD\to AD+BC\) is not a double - displacement (it could be a combination or some other non - standard form depending on \(A\), \(B\), \(C\), \(D\)). A single element replacing an ion in a compound is a single - displacement reaction.

Answer:

Two bonded compound switch ions.