Chemistry Lab: Metals Reactivity Order

Which metal is less reactive than copper according to the given order of reactivity?

What is the correct method to demonstrate that zinc is more reactive than copper?

Why is a solution of Al₂(SO₄)₃ in water not clear?

Which precaution is NOT necessary when handling metals in an experiment?

What does it imply if metal A displaces metal B from its salt solution?

Which metal can displace Zinc, Iron, and Copper from their salt solutions?

Which pair of metals can displace Copper from their salt solutions?

What happens when Copper is placed in Aluminum sulfate solution?

In the experiment, which metal was determined to be the least reactive?

After adding Zinc to Copper sulfate solution, what is the expected observation?

Which salt solution did Aluminum NOT react with in the experiment?

What is the main aim of the experiment described?

Which metal is capable of displacing Iron from its salt solution?

Experiment: Arranging Metals by Reactivity

Objective: Determine the reactivity order of metals (Al, Zn, Fe, Cu) using their reactions with metal salt solutions.
Materials: Test tubes, test tube stand, distilled water, sandpaper, forceps, aluminum, zinc, iron, copper, solutions of Al₂(SO₄)₃, ZnSO₄, FeSO₄, CuSO₄.
Procedure:
- Label four 50 ml beakers as aluminum sulphate, zinc sulphate, ferrous sulphate, and copper sulphate.
- Clean metal pieces (Al, Zn, Fe, Cu) using sandpaper and cut into small pieces.
- Add 10 ml of appropriate salt solution to each beaker.
- Add metal pieces to the salt solutions in each beaker.
- Observe colour changes or other reactions over 20 minutes.
- Repeat with different metals in different salt solutions.
- Record observations.
- Draw diagrams of each set-up, labeling metals and solutions.

Reactivity Order Inferences

Metals react differently with different solutions.
Aluminum is more reactive than zinc.
Zinc is more reactive than iron.
Iron is more reactive than copper.
This order (Al > Zn > Fe > Cu) is the order of decreasing reactivity. Metals higher on the list displace lower ones in their salt solutions.
Copper cannot displace any other metal from the solution of its salt.

Precautions

Handle chemicals carefully.
Label beakers clearly.
Clean metal strips with sandpaper before use.
Ensure dry and clean apparatus for accurate results.

Multiple Choice Questions

Q1: To demonstrate zinc's higher reactivity than copper, one should: Prepare a copper sulphate solution and dip a zinc strip into it.
Q2: Why is an aluminum sulphate solution in water not clear? Impurities are often found in aluminum sulphate or the water source.
Q3: Which metal is more reactive than zinc? Iron

Inference about Metal Displacement

If a metal (A) displaces another metal (B) from a metal salt solution, metal A is more reactive than metal B.

In this quiz, you will explore the reactivity order of metals including aluminum, zinc, iron, and copper. Based on a hands-on experiment using metal salt solutions, determine how these metals react with each other and with the solutions over time. Test your understanding of metal reactivity and chemical observations.