Photo AI
Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Chemistry - Question 5 - 2012 - Paper 1
Question 5
Complete the sentence by putting a cross (X) in the box next to your answer. When dilute hydrochloric acid reacts with copper oxide one of the products is A coppe... show full transcript
Worked Solution & Example Answer:Complete the sentence by putting a cross (X) in the box next to your answer - Edexcel - GCSE Chemistry - Question 5 - 2012 - Paper 1
Step 1
Step 2
Explain what is meant by electrolysis.
Answer
Electrolysis is a chemical process that uses an electric current to induce a chemical reaction, usually to decompose chemical compounds. In electrolysis, an electrolyte solution conducts electricity, allowing ions to move towards electrodes. At the anode, oxidation occurs, and at the cathode, reduction occurs, leading to the formation of products such as gases or metals.
Step 3
Step 4
Explain how the presence of sulfur in fossil fuels can lead to damage to the environment and how the amount of damage can be reduced.
Answer
The burning of sulfur-containing fossil fuels releases sulfur dioxide (SO₂) into the atmosphere. This gas can react with water vapor to form sulfurous and sulfuric acids, leading to acid rain. Acid rain can result in the acidification of lakes, harming aquatic life, damaging trees and forests, and causing erosion of stone structures.
To reduce damage, one approach is to use methods to clean exhaust gases before they are released into the atmosphere. This can include using calcium carbonate, which can neutralize sulfur dioxide to form calcium sulfate, or converting it into calcium hydroxide. Additionally, switching to cleaner energy sources and improving energy efficiency can minimize sulfur emissions.