Reactions of Zinc and Magnesium with Hydrochloric Acid

The video tutorial demonstrates the reactions of zinc and magnesium with hydrochloric acid. Zinc is cut into ribbons and reacts slowly, producing bubbles of hydrogen gas. Magnesium, already in ribbon form, reacts more vigorously, dissolving into magnesium ions and forming magnesium chloride. The video explains the differences in reactivity between the two metals and the chemical processes involved.

What form is the zinc in before it is added to the hydrochloric acid?

• Granules

• Sheet

• Ribbon

• Powder

What is observed when zinc is initially added to hydrochloric acid?

• No reaction

• Immediate vigorous bubbling

• Color change

• Slow bubble formation

How does the reaction of magnesium with hydrochloric acid compare to that of zinc?

• Less vigorous

• Equally vigorous

• No reaction

• More vigorous

What gas is produced when magnesium reacts with hydrochloric acid?

• Oxygen

• Nitrogen

• Hydrogen

• Carbon dioxide

What ions are formed when magnesium dissolves in hydrochloric acid?

• Zinc ions

• Magnesium ions

• Hydroxide ions

• Chloride ions

What compound is formed in the solution after magnesium reacts with hydrochloric acid?

• Magnesium carbonate

• Magnesium nitrate

• Magnesium sulfate

• Magnesium chloride

What happens to zinc in hydrochloric acid over time?

• It remains unchanged

• It dissolves rapidly

• It forms a precipitate

• It slowly bubbles and dissolves

What is the final product formed when zinc reacts with hydrochloric acid?

• Zinc carbonate

• Zinc chloride

• Zinc nitrate

• Zinc sulfate