The general representation of a reaction between a metal and an acid is ___________.

• When a metal reacts with an acid, it produces hydrogen gas and salt. 
• The general chemical equation for the reaction between a metal and an acid is:

             Metal + Acid → Salt + Hydrogen gas

• For example, when zinc metal reacts with hydrochloric acid, the reaction can be represented by the following equation:

               Zn + 2HCl → ZnCl₂ + H₂

• In this reaction, zinc displaces hydrogen from hydrochloric acid to produce zinc chloride and hydrogen gas.