Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

11 Questions

0 Views

17 Redox Reactions SAQ1

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 is the oxidation state of Manganese in Potassium Permanganate?

Why is dilute sulphuric acid added to the KMnO4 solution during the titration?

To prevent the formation of an intermediate oxidation state (+4) and to ensure the complete reduction of Mn.

What is the purpose of adding dilute H2SO4 to the Iron tablet titration?

To prevent Fe(2+) from being oxidised to Fe(3+) by air and to ensure the complete reduction of Mn.

What is the ratio of MnO₄⁻ to Fe²⁺ in the redox reaction?

1 : 5 Signup and view all the answers

What is the colour change observed during the titration of Potassium Permanganate vs. Ammonium Iron(II) Sulfate?

Purple → Brown → Colourless → Persisting Pale Pink Signup and view all the answers

What is the role of Iron tablets in medicine?

To prevent anaemia. Signup and view all the answers

What is the reducing agent in the redox reaction between Potassium Permanganate and Ammonium Iron(II) Sulfate?

Fe²⁺ (Iron(II)) Signup and view all the answers

What ions in tap water would interfere with the experiment, and why must they be avoided?

Chloride ions, which would displace iodine from iodine solutions, giving an inaccurate result. Signup and view all the answers

What is the purpose of excess potassium iodide in the iodine solution, and how does it achieve this?

To ensure all I₂ ions from potassium iodate are released, and to keep the formed iodine in solution. Signup and view all the answers

What is the role of starch indicator in the experiment, and when is it added?

To detect the presence of iodine, and it is added when the solution turns straw yellow. Signup and view all the answers

What is the active ingredient in bleaches?

The hypochlorite ion (OCl-) Signup and view all the answers