Potassium hydroxide (koh) and hydrochloric acid (hcl) react in a beaker. they form potassium chloride (kcl) and water (h2o). what type of reaction is this? synthesis reaction
double replacement reaction
single replacement reaction
decomposition reaction

double replacement reaction

Explanation:

1. Synthesis reaction is a chemical reaction in which two reactants are combining to form one product.

Example:  

2. Double displacement reaction is one in which exchange of ions take place. Neutralization is a special type of double displacement where acid reacts with base to form salt and water.

Example:

3. Single replacement reaction is a chemical reaction in which more reactive element displaces the less reactive element from its salt solution.

Example:

4. Decomposition is a type of chemical reaction in which one reactant gives two or more than two products.

Example: