Explain why the students can correctly conclude that the hydrate

If a sample loses water during heating, it is NOT a hydrate. If it does not lose any water, then it IS a hydrate.

It does not lose any water during the heating process.

The hydrate is a compound: it consists of two parts. One part is water, and the other part is salt. When you heat the hydrate, it doesn’t lose any water during the heating process.

Because the hydrate is 100% water.

The hydrate is 100% water. It does not lose any water during the heating process so it can be used as a substitute for water in many applications.

The hydrate’s mass after heating will equal that of its anhydrous salt.

The hydrate’s mass after heating will equal that of its anhydrous salt. Hydrates are 100% water, so their mass does not change. Therefore, we can say that if you heat a piece of hydrate at room temperature for one hour, then you should get back exactly what you started with—a piece of anhydrous salt (which has no water).

If a sample loses water during heating, it is NOT a hydrate. If it does not lose any water, then it IS a

If a sample loses water during heating, it is NOT a hydrate. If it does not lose any water, then it IS a hydrate.

If the sample loses any water during heating to 100 °C and then purifies under vacuum at atmospheric pressure (1 bar), it will be found that crystals remain in the solution after filtration—this was confirmed by XRD analysis.

Conclusion

For example, if a sample loses water during heating and rehydrates, it is not a hydrate. If it does not lose any water, then it IS a hydrate. The key here is that if you have a sample of anhydrous salt and heat it to 100°C without any water loss, the solution will also contain 100% anhydrous salt.

For more details visit this website: contents gallery