Displacement reactions of metals worksheet for chemistry lab activity.

Worksheet titled "Displacement reactions of metals" with instructions and table for recording observations of chemical reactions.

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Final Answer:
The experiment shows that when magnesium reacts with hydrochloric acid, hydrogen gas is produced. The reaction is:
Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g)
The gas collected over water is hydrogen, and its volume can be measured using a graduated cylinder inverted in water. After correcting for water vapor pressure, the moles of H₂ can be calculated using the ideal gas law. The results confirm the 1:1 mole ratio between Mg and H₂, supporting the balanced equation.

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