14 Oxidation & Reduction Reactions SAQ2

Oxidation is the loss of electrons

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

A reducing agent is a substance that allows reduction to happen by losing electrons itself.

<p>The reaction between chlorine and sulphite solution is the oxidation of sulphite to sulfate, resulting in the formation of a white precipitate.</p> Signup and view all the answers

<p>To test for sulfites, add BaCl₂ to the solution, and if a white precipitate forms, it indicates the presence of sulfites. Adding dilute HCl will then dissolve the precipitate.</p> Signup and view all the answers

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

<p>A sulphite is a molecule that contains the sulphite ion (SO₃²⁻), while a sulfate is a molecule that contains the sulfate ion (SO₄²⁻).</p> Signup and view all the answers

<p>To test for Fe²⁺ ions, add 10 drops of NaOH to the solution, and if a green precipitate forms, it indicates the presence of Fe²⁺ ions.</p> Signup and view all the answers

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

<p>Add 10 drops of NaOH, and an orange-brown ppc indicates the presence of Fe 3+ ions</p> Signup and view all the answers

<p>Add Iron II sulphate and 5 drops of concentrated sulphuric acid, and a brown ring forms near the bottom of the test tube</p> Signup and view all the answers

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