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Questions and Answers
Which metal is less reactive than copper according to the given order of reactivity?
Which metal is less reactive than copper according to the given order of reactivity?
- Iron (correct)
- Nickel
- Aluminum
- Zinc
What is the correct method to demonstrate that zinc is more reactive than copper?
What is the correct method to demonstrate that zinc is more reactive than copper?
- Add hydrochloric acid to zinc.
- Mix zinc with copper sulfate solution. (correct)
- Dissolve both zinc and copper in water.
- Combine zinc and copper in a heated environment.
Why is a solution of Al₂(SO₄)₃ in water not clear?
Why is a solution of Al₂(SO₄)₃ in water not clear?
- Inadequate mixing of the solution.
- Reaction with oxygen in the air.
- Presence of dissolved salts.
- Hydrolysis of Al₂(SO₄)₃ forms colloidal particles. (correct)
Which precaution is NOT necessary when handling metals in an experiment?
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?
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 metal can displace Zinc, Iron, and Copper from their salt solutions?
Which pair of metals can displace 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?
What happens when Copper is placed in Aluminum sulfate solution?
In the experiment, which metal was determined to be the least reactive?
In the experiment, which metal was determined to be the least reactive?
After adding Zinc to Copper sulfate solution, what is the expected observation?
After adding Zinc to Copper sulfate solution, what is the expected observation?
Which salt solution did Aluminum NOT react with in the experiment?
Which salt solution did Aluminum NOT react with in the experiment?
What is the main aim of the experiment described?
What is the main aim of the experiment described?
Which metal is capable of displacing Iron from its salt solution?
Which metal is capable of displacing Iron from its salt solution?
Flashcards
Displacement Reaction
Displacement Reaction
A chemical reaction where one metal replaces another metal from its salt solution.
Reactivity of metals
Reactivity of metals
The ability of a metal to lose electrons and form positive ions.
Reactivity Series
Reactivity Series
A series of metals arranged in decreasing order of their reactivity. The metals at the top of the series are more reactive than those at the bottom.
Metals: Aluminum, Zinc, Iron, Copper
Metals: Aluminum, Zinc, Iron, Copper
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Aluminum's Reactivity
Aluminum's Reactivity
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Zinc's Reactivity
Zinc's Reactivity
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Iron's Reactivity
Iron's Reactivity
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Copper's Reactivity
Copper's Reactivity
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Metal Reactivity
Metal Reactivity
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Single Displacement Reaction
Single Displacement Reaction
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Metal Reactivity Experiment
Metal Reactivity Experiment
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Study Notes
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.
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