Today in the STEM lab, I engaged my 7th standard students in an exciting and curiosity-building chemistry experiment — preparing hydrogen gas using dilute hydrochloric acid (HCl) and magnesium ribbon. It was truly a colourful and energetic learning experience for the students.
Hydrogen Gas
In the lab, students observed the reaction between:
Magnesium ribbon (Mg)
Dilute Hydrochloric Acid (HCl)
When magnesium was added to dilute HCl, bubbles started forming immediately. Students were excited to see the reaction happening live in front of them.
To confirm the presence of hydrogen gas, we performed the famous “POP” sound test.


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