Compound and mixture

Compound and Mixture Experiment

Understanding the difference between compounds and mixtures is a foundational concept in chemistry. A compound is formed when two or more elements combine chemically in a fixed ratio, creating a new substance with properties different from the original elements. A mixture, however, is simply a combination of substances where each keeps its own properties.

Detailed Explanation of this Compound and Mixture Experiment:

Imagine you take iron filings and sulphur powder and mix them together. Initially, you can still see both components separately, and if you bring a magnet near the mixture, it attracts the iron filings. This is a mixture—each substance behaves just like it did before.

Now, if you heat this mixture, a chemical reaction occurs and a black compound called iron sulphide (FeS) forms. This new substance no longer behaves like iron or sulphur. It’s not attracted to a magnet, and it doesn’t dissolve in carbon disulphide like sulphur does. That’s because a compound has formed—iron and sulphur have reacted chemically and created something entirely new.

Key Differences:

This experiment teaches us about homogeneous and heterogeneous mixtures, physical vs. chemical changes, and how substances behave when they combine chemically.

Explore Compound and mixture in Dencity Virtual Science Lab

The Dencity app brings this science experiment to life in a fully interactive and safe virtual science lab. No need for real chemicals or a physical lab—students can explore how iron and sulphur behave before and after heating, perform solubility and magnetic tests, and even observe gas evolution with hydrochloric acid—all virtually.

The Dencity virtual lab is available on Android, iOS, and Desktop, making science accessible, fun, and immersive for everyone.

Dencity for Teachers

Dencity supports interactive teaching by enabling educators to demonstrate science experiments visually and dynamically. With Dencity:

• Teachers can explain concepts like mixtures and compounds using real-time simulations.

• Lessons become more engaging and easier to understand.

• It eliminates lab setup hassle, chemical costs, and safety concerns.

• Aligns with the science curriculum for class 9 and enhances digital learning.

Seamless Integration with Smart Classrooms

Dencity works perfectly with interactive touch panels commonly used in modern classrooms. Just tap, drag, and simulate experiments like never before—turn your science class into an interactive experience.

Want Dencity in Your School?

We offer customized pricing and demos for schools and educational institutions. Contact us today to bring virtual science labs to your classrooms with Dencity.

Frequently Asked Questions for Compound and Mixture

1. What is the difference between a compound and a mixture?
   A compound is a new substance formed by a chemical reaction between elements, while a mixture retains the original properties of the substances.

2. What happens when iron and sulphur are heated together?
   They react chemically to form a black compound called iron sulphide.

3. Is the iron-sulphur mixture before heating a compound?
   No, it is a mixture because no chemical change has occurred.

4. What is iron sulphide?
   A compound formed when iron and sulphur are heated and undergo a chemical reaction.

5. How can you identify a mixture using a magnet?
   If iron is still present, a magnet will attract it, indicating it’s a mixture.

6. Why is carbon disulphide used in this experiment?
   To test solubility—sulphur dissolves in it, but the compound does not.

7. Why does the mixture produce hydrogen gas with HCl?
   Iron reacts with hydrochloric acid to produce hydrogen gas.

8. Why does the compound produce hydrogen sulphide with HCl?
   Because FeS reacts with HCl to form hydrogen sulphide, a different gas.

9. Is this experiment safe for school labs?
   Yes, but it should be done under supervision or better yet, on Dencity virtually.

10. Can this be done on a mobile phone?
    Yes! Dencity is available on Android, iOS, and Desktop platforms.