Question

when you think of the term double replacement, what do you imagine might be happening?
select the single best answer below to describe double replacement:
one thing joins with two other things.
two different things change places with each other.
two things join together.
one thing replaces another.

Explanation:

In a double - replacement reaction, the general form is \(AB + CD
ightarrow AD+CB\). Here, the cations (\(A\) and \(C\)) and anions (\(B\) and \(D\)) exchange partners. This is analogous to two different things (the ions or parts of the compounds) changing places with each other.

• The option “One thing joins with two other things” does not describe a double - replacement reaction. In a double - replacement, there are two reactant compounds and two product compounds, not one reactant combining with two others.
• The option “Two things join together” is more characteristic of a synthesis reaction (\(A + B

ightarrow AB\)) rather than a double - replacement reaction.

• The option “One thing replaces another” is a description of a single - replacement reaction (\(A+BC

ightarrow AC + B\))

Answer:

Two different things change places with each other.