How To Calculate Oxidation Numbers - Basic Introduction

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🎯 Key Takeaways for quick navigation:
00:15 *🧪 The oxidation state of pure elements is always zero.*
01:32 *📜 When dealing with ions like mercury or peroxide, divide the total charge to find individual oxidation states.*
03:43 *🚀 Fluorine in compounds typically has a -1 oxidation state; oxygen usually has -2, unless in peroxides (-1) or superoxides (-1/2).*
05:20 *💡 In compounds like MgCl₂, the total charge of the compound determines oxidation states; Mg²⁺ implies Cl⁻ will be present, resulting in Mg²⁺ and Cl⁻ ions.*
06:08 *🧮 In compounds like vanadium oxide, the term "oxide" implies oxygen will have a -2 charge; calculate the oxidation state of the other element(s) accordingly.*
09:48 *🧲 Electronegativity increases towards fluorine on the periodic table; it determines the distribution of charges in compounds.*
12:40 *🧠 In compounds like oxygen difluoride, the more electronegative element bears a negative charge; oxygen's oxidation state can vary depending on the compound.*
17:45 *📊 Use electronegativity to predict oxidation states; more electronegative elements tend to have negative oxidation states.*
20:32 *🧲 Average oxidation states can be fractional; they represent the distribution of charges among ions in compounds.*
24:24 *🔍 In polyatomic ions like HSO₄⁻, deduce oxidation states based on the charges of known elements within the ion.*
27:36 *📐 In complex ions like K₂CrO₄, determine oxidation states by balancing charges to achieve electrical neutrality.*
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00:06 Oxidation numbers: pure elements have an oxidation state of zero, ions have oxidation state equal to their charge
02:38 Fluorine and oxygen have predictable oxidation states in compounds.
08:11 The oxidation states of elements within compounds and polyatomic ions can be found by adding or subtracting based on the net charge.
10:40 Electronegativities determine the charge distribution in compounds
15:36 Sulfur dioxide and hydrogen sulfide have different oxidation states.
17:51 Elements with different electronegativities have different oxidation states
22:32 The average oxidation state is 2.67
24:32 Sulfur has an oxidation state of +4.
29:16 Electronegativity determines oxidation state

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