Electricity and Electroplating

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What did the scientist discover by placing a copper plate in a potato?

  • The potato absorbed the copper plate
  • The potato generated electricity
  • The potato had a chemical effect on the copper plate (correct)
  • The copper plate caused the potato to change color

In the context of electroplating, what is the purpose of adding dilute sulphuric acid to copper sulphate solution?

  • To change the color of the copper plates
  • To dissolve the copper plates
  • To prevent the formation of a shiny coating
  • To make the copper sulphate solution more conducting (correct)

Why might a layer of gold coating wear off ornaments with repeated use?

  • Due to exposure to sunlight
  • Due to contact with water
  • Due to exposure to air
  • Due to repeated scratching (correct)

What happens to the shiny coating of a brand new bicycle when it is accidentally scratched?

<p>It wears off, revealing a not so shiny surface beneath (C)</p> Signup and view all the answers

What is the purpose of cleaning the copper plates with sand paper in Activity 14.7?

<p>To remove the shiny coating (C)</p> Signup and view all the answers

What is the role of the battery in Activity 14.7?

<p>To provide an electric current for the electroplating process (B)</p> Signup and view all the answers

How does electroplating relate to women's gold ornaments?

<p>It explains how gold coating can wear off ornaments (A)</p> Signup and view all the answers

What was significant about the discovery made by the scientist in relation to potatoes and electricity?

<p>It demonstrated a chemical effect of potatoes on metals (B)</p> Signup and view all the answers

Why is it mentioned that sometimes science works by looking for one thing and discovering something else?

<p>It highlights the element of surprise in scientific discoveries (C)</p> Signup and view all the answers

Flashcards are hidden until you start studying

Study Notes

Electroplating

  • Electroplating is a process that involves depositing a thin layer of a material, often a metal, onto the surface of another material using an electric current.

The Scientist's Discovery

  • A scientist discovered that a copper plate placed in a potato can generate electricity, which led to the concept of electroplating.

Electroplating Process

  • Dilute sulphuric acid is added to copper sulphate solution in electroplating to increase the conductivity of the solution.

Limitations of Electroplating

  • A layer of gold coating can wear off ornaments with repeated use due to abrasion or corrosion.
  • If a brand new bicycle's shiny coating is accidentally scratched, the underlying metal can corrode.

Experiment 14.7

  • Copper plates are cleaned with sandpaper in Activity 14.7 to remove any impurities or oxidation that may affect the electroplating process.
  • The battery in Activity 14.7 provides the electric current necessary for the electroplating process to occur.

Electroplating in Real Life

  • Electroplating is often used to add a thin layer of gold to women's ornaments to give them a luxurious appearance.
  • Electroplating can be used to extend the life of ornaments and other items by protecting them from corrosion.

Scientific Discovery

  • The scientist's discovery in relation to potatoes and electricity led to the concept of electroplating, which has numerous practical applications.
  • Sometimes, scientific discoveries can occur unintentionally, as scientists may be looking for one thing but discover something else, as seen in the scientist's discovery with the potato.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Quiz Team

More Like This

Electricity Unit Flashcards
23 questions
Electricity Flashcards 4.1
37 questions

Electricity Flashcards 4.1

ManeuverableForgetMeNot2590 avatar
ManeuverableForgetMeNot2590
Use Quizgecko on...
Browser
Browser