Synthesis means exactly what it says.

A typical double replacement reaction can occur when two ionic compounds are mixed together. In water these ionic compounds split apart into their respective anions and cations. The cations now have an opportunity to swap anions. A reaction occurs if, by swapping anions, a product is formed that cannot split apart into anions and cations. In the above example: the reaction of silver nitrate and sodium chloride. The silver, nitrate, sodium and chloride ions all begin in solution. When a silver ion combines with a chloride ion, it leaves the solution and becomes a solid. This drives the reaction to completion.

In a single replacement reaction Minnie Mouse leaves Mickey Mouse for Goofy.

The chemical equation for this single replacement reaction looks like:

reactant + reactant ---------> product + product
To visualize a single replacement reaction look at the following cartoon:


Notice, the guy in the orange shirt steals the date of the other guy.


An example of a synthesis reaction is:

If it is a gas, it will be seen as bubbles in the solution.
A single replacement reaction can be marked by one of the indicators of a chemical reaction (color change, gas emission, a precipitate forming, change in temperature).


Single Replacement - Chemical Reactions

You need to be able to recognize single replacement reactions AND be able to break a formula apart into proper cations and anions as well as write correct formulasHere are several examples which are solved below:

1) ZnS + O2 --->
2) K + H2O --->
3) Fe + HCl --->
4) NaI + Br2 --->
Example #1How to figure out the right (or product side):(1) Decide if the reactant element (O2 in this case) is normally positive or negative.

Single-Replacement Reaction - Rhode Island College

The only examples the ChemTeam knows about involve halogens, so here are two examples:

Cl2 + NaBr ---> NaCl + Br2
Br2 + KI ---> KBr + I2
In single replacement, one reactant is always an element.

Predicting Single Replacement Reactions

Here's another example of a synthesis reaction:

H2 + O2 ---> H2O2
This happens to be a reaction that can never take place.

synthesis, decomposition, single replacement and double ..

the zinc is replacing the copper in the compound. This is called a singlereplacement or single displacement reaction.

Single displacement reaction calculator | Calistry

Every single and double replacement reaction involves ionizing. The root for this certainty stems from the fact that both typically take place in an aqueous solution (solution in water) containing primary constituents that are in ion form. So, both a single and double replacement reaction is often referred to as an ion reaction.