Question

experiment to find constituents of solder?

Answer 1

Answer:

Solder can be made by heating together the metals lead and tin. The hardness, melting point and density of the alloy can be compared to lead.

Explanation:

The most likely incident in this experiment is a student burning themselves, so warn them about the equipment being hot.

If students are not sure how to use tongs correctly (pouring molten metal can be hazardous and lead to burns) it is worth demonstrating how to use them safely. Some tongs in schools do not grip well. Technicians must check them before starting the experiment.

Lead is a toxic metal and if it is heated for too long or too high above its melting point it can start to give off fumes. Ensure that the laboratory is well-ventilated. Warn students not to breathe the fumes given off by their experiment and tell them to heat the metals for the shortest time possible to get them to melt. Wash hands after handling lead.

The experiment should be completed in 40 minutes. However, this depends on the experience and practical abilities of the students. Further time may be required for allowing the equipment to cool before it can be put away.