Explanation Step 1: Sodium sulfide is formed form hydrogen sulfide by the reaction with sodium hydroxide. The skeletal equation for this reaction can be written as follows; H 2 S ( g ) + NaOH ( s ) → Na 2 S ( a l c ) + H 2 O ( l ) Balancing sodium atoms: In the reactant side, there is one sodium atom, while on the product side there are two sodium atoms. Adding coefficient 2 before NaOH balances the sodium atoms on both sides of the equation. Therefore, the chemical equation can be written as follows; H 2 S ( g ) + 2 NaOH ( s ) → Na 2 S ( a l c ) + H 2 O ( l ) Balancing oxygen atoms: In the reactant side, there are two oxygen atoms, while on the product side there is only one oxygen atom. Adding coefficient 2 before H 2 O balances the oxygen atoms on both sides of the equation. This step balances the other atoms also. Therefore, the balanced chemical equation can be written as follows; H 2 S ( g ) + 2 NaOH ( s ) → Na 2 S ( a l c ) + 2 H 2 O ( l ) Step 2: Sodium sulfide reacts with hydrogen sulfide to form sodium polysulfide. The skeletal equation for the reaction is given as follows; H 2 S ( g ) + Na 2 S ( a l c ) → Na 2 S 5 ( a l c ) + H 2 ( g ) Balancing sulfur atom: In the reactant side, there are two sulfur atoms. While on the product side, there are five sulfur atoms. Adding coefficient 4 before H 2 S balances out the sulfur atoms on both sides of the equation. The chemical equation can be given as follows; 4H 2 S ( g ) + Na 2 S ( a l c ) → Na 2 S 5 ( a l c ) + H 2 ( g ) Balancing hydrogen atom: In the reactant side, there are eight hydrogen atoms. While on the product side, there are two hydrogen atoms. Adding coefficient 4 before H 2 balances out the hydrogen atoms on both sides of the equation. This step balances the other atoms also. The chemical equation can be given as follows; 4H 2 S ( g ) + Na 2 S ( a l c ) → Na 2 S 5 ( a l c ) + 4 H 2 ( g ) Step 3: Sodium polysulfide reacts with oxygen results in the formation of hypo

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Author: ATKINS

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Chapter F, Problem H.23E

Interpretation Introduction

Interpretation:

Three balanced chemical equation has to be written for the preparation of hypo from hydrogen sulfide and sodium hydroxide.

Concept Introduction:

Chemical equation is a short form representation of a chemical reaction with all the required conditions necessary for the reaction to take place. As the atoms are neither created nor destroyed in a chemical reaction, the number of atoms of same element has to be equal on both sides of the equation. This is known as balanced chemical equation. Coefficients can be changed but not the subscript.

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Chapter F, Problem H.22E

Chapter F, Problem H.24E

Chapter F Solutions

CHEM PRINCIPLES LL W/ACHIEVE ONE-SEM

Ch. F - Prob. A.1AST Ch. F - Prob. A.1BST Ch. F - Prob. A.2AST Ch. F - Prob. A.2BST Ch. F - Prob. A.3AST Ch. F - Prob. A.3BST Ch. F - Prob. A.4AST Ch. F - Prob. A.4BST Ch. F - Prob. A.5AST Ch. F - Prob. A.5BST

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