Science Fair Projects World

Reaction of Metals with Acids


Examine the reactivity of different metals with hydrochloric acid and measure the rate of hydrogen gas evolution.


  • Hydrochloric acid (HCl)
  • Small pieces of various metals (e.g., zinc, magnesium, iron, copper)
  • Test tubes
  • Test tube rack
  • Balloon or gas collection apparatus
  • Notebook for observations


  1. Add a small piece of metal to each test tube.
  2. Pour hydrochloric acid into the test tube until the metal is fully submerged.
  3. Cover the test tube with a balloon or gas collection apparatus to capture the hydrogen gas produced.
  4. Observe the reaction and measure the time it takes for the balloon to inflate or for a set volume of gas to be collected.
  5. Record the rate and intensity of the reaction for each metal in the notebook.
  6. Compare the reactivity of different metals with hydrochloric acid.
  7. Analyze the results to understand the reactivity series of metals.