Question 1: Displacement reactions occur when a more reactive metal displaces a less reactive metal from its compound. Explain the scientific principle behind this process.

Answer: Displacement reactions are based on the reactivity series, where a more reactive metal can displace a less reactive metal from its compound due to its higher tendency to lose electrons and form positive ions.

Question 1: Define a displacement reaction in the context of metals.

Answer: A displacement reaction is a chemical reaction where a more reactive metal replaces a less reactive metal in a compound.

Question 2: Describe the role of the reactivity series in predicting displacement reactions.

Answer: The reactivity series ranks metals based on their reactivity, allowing us to predict whether a displacement reaction will occur by comparing the positions of the metals involved.

Question 1: Given that zinc displaces copper from copper sulfate solution, and the initial mass of copper sulfate is 50 g, calculate the mass of zinc required to displace 10 g of copper. (Atomic masses: Zn = 65 g/mol, Cu = 63.5 g/mol)

Answer: The molar ratio of Zn to Cu in the reaction is 1:1. To displace 10 g of Cu: mol Cu = 10 g / 63.5 g/mol ≈ 0.157 mol. Therefore, mass of Zn needed = 0.157 mol × 65 g/mol ≈ 10.2 g.

Question 1: Describe the steps you would follow to test whether aluminum can displace iron from its compound in a laboratory setting. Include safety precautions.

Answer: First, prepare a solution of iron salt (e.g., iron chloride). Then, add aluminum foil to the solution and observe for signs of reaction, such as bubbling or a change in solution color. Ensure to wear safety goggles and gloves, handle acids carefully, and dispose of chemicals properly after the experiment.

Question 1: A series of metals (Al, Fe, Cu, Ag) are tested for their ability to displace ions in solution. The observed reactions are: Al displaces Fe and Cu; Fe displaces Cu; Ag does not displace any metal. Based on this data, rank the metals from most reactive to least reactive.

Answer: Most reactive: Aluminum (Al), then Iron (Fe), then Copper (Cu), and least reactive: Silver (Ag).

Question 1: Explain why gold does not displace copper from copper sulfate solution, using the reactivity series.

Answer: Gold is less reactive than copper according to the reactivity series. Since a more reactive metal is needed to displace a less reactive metal, gold cannot displace copper from its compound.

Question 1: Describe a practical example where displacement reactions are used in industry or everyday life, explaining its significance.

Answer: Galvanization uses displacement reactions to coat iron with zinc, protecting it from corrosion. Zinc displaces iron in a sacrificial anode process, preventing rusting.