Chlorine gas was first prepared by Karl Scheele in 1774 by...

Name: Problem 60, Chapter 21: Chemistry: The Molecular Science
Uploaded: 2021-08-11T03:34:56-08:00
Duration: 3 min 55 s
Channel: Tracy Tourville
Description: Chlorine gas was first prepared by Karl Scheele in 1774 by the reaction of sodium chloride, manganese(IV) oxide, and sulfuric acid. In addition to chlorine, the reaction produces water, sodium sulfate, and manganese(II) sulfate. Write the balanced equation for this reaction.

Chlorine gas was first prepared by Karl Scheele in 1774 by the reaction of sodium chloride, manganese(IV) oxide, and sulfuric acid. In addition to chlorine, the reaction produces water, sodium sulfate, and manganese(II) sulfate. Write the balanced equation for this reaction.

Key Concepts

Nomenclature of Chemical Compounds

Understanding the chemical naming conventions for compounds, including specifying oxidation states (e.g., manganese(IV) oxide versus manganese(II) sulfate), is crucial for correctly identifying reactants and products in a chemical equation. This clarity helps ensure that the balanced reaction accurately reflects the substances involved.

Redox Reactions

Redox (reduction-oxidation) reactions are a type of chemical reaction in which electrons are transferred between species. One substance is oxidized (loses electrons) while another is reduced (gains electrons), and understanding these electron transfers is key to balancing reactions where changes in oxidation states occur.

Stoichiometry

Stoichiometry is the branch of chemistry that deals with the quantitative relationships between reactants and products in a chemical reaction. It is essential for determining the correct ratios of substances involved, which is necessary when writing a balanced chemical equation.

Balancing Chemical Equations

Balancing chemical equations involves ensuring that the number of atoms for each element is the same on both the reactant and product sides, in accordance with the law of conservation of mass. This process requires adjusting coefficients to make sure that mass and charge are neither created nor destroyed during the reaction.

Transcript

00:01 This question, we're asked to balance a chemical reaction.

00:05 But we're also asked to look at some nomenclature and identify structures from nomenclature.

00:12 So we're given a series of reactants here, a sodium chloride, and i'm going to trust you know the formula for sodium chloride is nacl, a manganese 4 oxide.

00:22 We should know that with the transition metal like manganese, this romanum represents the charge that the manganese has to have.

00:30 So rumenuminal 4 means a plus 4 charge for the manganese in this compound.

00:36 And sulfuric acid.

00:37 So sulfuric acid is going to be h2s .4.

00:41 Those are my reactants.

00:43 Our products are going to be chlorine, sodium sulfate, water, and again, plus 2 charge here for manganese 2 sulfate.

00:56 So we're going to have a manganese 2 sulfate written that way.

01:02 By the way, the formula up here for the manganese 4 oxide with its plus 4 charge would make this mn02 to accommodate the minus 4 charge that the two oxygens would provide.

01:20 So now we know all of the reactants in the proper formulas, all of the products in their proper formulas.

01:27 So let's just sort of write the reaction based on now the proper formulas for the reactants.

01:36 We're reacting sodium chloride, manganese -4 oxide, sulfuric acid to produce chlorine and water...

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