Question

the reaction hcl + naoh → h₂o + nacl is what type of reaction?
reversible
exchange
decomposition
hydrolysis
synthesis

Explanation:

In the reaction $\mathrm{HCl}+\mathrm{NaOH}\to\mathrm{H}_{2}\mathrm{O}+\mathrm{NaCl}$, the hydrogen of hydrochloric acid and the sodium of sodium - hydroxide exchange places. This is characteristic of an exchange reaction (also known as a double - displacement or metathesis reaction). It is not a reversible reaction as it goes to completion under normal conditions, not a decomposition reaction (which involves a single compound breaking down), not a hydrolysis reaction (which involves water breaking down a compound), and not a synthesis reaction (which involves combining elements or simple compounds to form a more complex one).

Answer:

B. exchange