Reaction with Acids in Metals and Non-Metals – Class 8 Science Experiment

Chapter Name: Metals and Non-Metals

Activity Name: Reaction with Acids in Metals and Non-Metals

Activity Description:

In this experiment, we will investigate the reactions of different samples (metals and non-metals) with both dilute hydrochloric acid and sulfuric acid. We will observe the reactions and check for the liberation of hydrogen gas. The presence of a pop sound with a burning match stick will indicate the release of hydrogen gas.

Required Items:

1. Test tubes
2. Dropper
3. Dilute hydrochloric acid
4. Concentrated hydrochloric acid
5. Sulfuric acid
6. Samples of various metals and non-metals (as given in Table 8)
7. Burning match stick

Step by Step Procedure:

1. Take the samples of metals and non-metals given in Table 8 and place them in separate test tubes.
2. Add 5ml of dilute hydrochloric acid to each test tube using a dropper.
3. Observe the reactions. If there is no reaction, gently heat the test tubes.
4. If there is still no reaction, add 5 drops of concentrated hydrochloric acid to each test tube.
5. Bring a burning match stick near the mouth of the test tube and observe what happens.
6. Record your observations in Table 8.
7. Repeat the same experiment with sulfuric acid and record the observations in Table 8.

Experiment Observations:

Record the observations of each sample in Table 8. Note down whether there was a reaction with dilute hydrochloric acid, any change after adding concentrated hydrochloric acid, and the presence of a pop sound when a burning match stick is brought near the mouth of the test tube.

Note down your observation in table format:

Precautions:

1. Handle acids with care and wear appropriate safety equipment like gloves and goggles.
2. When heating the test tubes, do it gently and ensure proper ventilation.
3. Use a dropper to add the acids and handle it with care to avoid spills.
4. Take necessary precautions while handling burning match sticks.

Lesson Learnt from Experiment:

Through this experiment, we will learn that some metals react with dilute hydrochloric acid and sulfuric acid, liberating hydrogen gas. On the other hand, non-metals usually do not react with acids and do not release hydrogen gas.