An example of a laboratory experiment report on determining a substance that has a melting point of 78 degrees.

Title: Determination of the Melting Point of Substance X

Objective:
The objective of this experiment is to determine the melting point of Substance X using a melting point apparatus.

Materials:
- Substance X
- Melting point apparatus
- Thermometer
- Watch glass
- Bunsen burner
- Tripod stand
- Wire gauze
- Beaker
- Stirring rod

Procedure:
1. Place a small amount of Substance X on a watch glass.
2. Set up the melting point apparatus according to the manufacturer's instructions.
3. Insert the thermometer into the melting point apparatus.
4. Heat the Substance X slowly using a Bunsen burner until it starts to melt.
5. Record the temperature at which the Substance X completely melts.

Results:
The Substance X melted at a temperature of 78 degrees Celsius.

Discussion:
Based on the results of the experiment, the melting point of Substance X was determined to be 78 degrees Celsius. This indicates that Substance X is a pure substance, as impurities would cause the melting point to be lower or higher than the expected value. The melting point of 78 degrees Celsius also matches the expected melting point of Substance X, confirming the identity of the substance.

Conclusion:
In conclusion, the melting point of Substance X was successfully determined to be 78 degrees Celsius using a melting point apparatus. This experiment demonstrates the importance of melting point determination in identifying and characterizing substances.

Laboratory Experiment Report

Title: Determination of the Melting Point of an Unknown Substance

Objective:

To determine the melting point of an unknown substance.

Materials:

- Unknown substance
- Melting point apparatus
- Thermometer
- Capillary tube
- Safety goggles

Procedure:

1. Put on safety goggles.
2. Grind the unknown substance into a fine powder.
3. Fill a capillary tube with the powdered substance to a height of about 1 cm.
4. Insert the capillary tube into the melting point apparatus.
5. Heat the melting point apparatus slowly using a Bunsen burner.
6. Observe the substance through the magnifying glass and record the temperature at which it begins to melt.
7. Continue heating the substance until it is completely melted.
8. Record the temperature at which the substance is completely melted.

Results:

| Observation | Temperature (°C) |
|---|---|---|
| Substance begins to melt | 75 |
| Substance is completely melted | 78 |

Conclusion:

The melting point of the unknown substance is 78 degrees Celsius.