14 Oxidation & Reduction Reactions SAQ1

Oxidation is the loss of electrons, while reduction is the gain of electrons.

An oxidising agent is a substance that allows oxidation to happen by gaining electrons itself.

To test for sulphites, and a white precipitate is expected to form.

<p>Chlorine is a reducing agent because it allows reduction to happen by losing electrons itself, and when added to a sulphite solution, it oxidises the sulphite to sulfate.</p> Signup and view all the answers

<p>To dissolve the white precipitate, and the expected observation is that the white precipitate dissolves.</p> Signup and view all the answers

<p>The purpose of the test is to ensure that no Fe³⁺ is present, and the expected observation is the formation of a green precipitate.</p> Signup and view all the answers

<p>All halogens are reducing agents, and when chlorine water is added to potassium iodide solution, it oxidises the iodide to liberate iodine, which turns the solution from colourless to red-brown.</p> Signup and view all the answers

<p>Red-Brown</p> Signup and view all the answers

<p>A brown ring formed near the bottom of the test tube</p> Signup and view all the answers

<p>The precipitate dissolves</p> Signup and view all the answers

<p>A white precipitate is formed</p> Signup and view all the answers

<p>A yellow precipitate is formed</p> Signup and view all the answers

<p>OILRIG</p> Signup and view all the answers