Question

How do single replacement reactions differ from double replacement reactions?

Answer 1

The main different between a single replacement and a double replacement is how much is swapped.

For example:
AB + C => A+BC //single replacement
AD+CB => AB + CD //double replacement

If you want to go into more detail of such like, what type of solution is most common for single replacement or double replacement or what is a replacement on the chemical scale, please message me on YouTube at https://www.youtube.com/user/sirlegna If get enough desire to understand this concept I will make a video on the subject matter.