The balanced equation for preparation of GeS 2 from tetraethoxygermane and H 2 S should be determined. Concept introduction: The sol-gel method is a process that is used to produce metal oxide powder from metal alkoxide. Alkoxide is alkyl derivative molecule of alcohol. In the sol-gel method, metal alkoxide dissolves in suitable organic solvent and then reacts with water to introduce hydrolysis reaction. In hydrolysis reaction, the metal-alkoxide bonds ( M − OR ) breaks and metal-hydroxide ( M − OH ) will form. This new product is known as sol. After formation of sol, the water molecules from sol molecule get eliminated to form bridge bonding and form a gel-like material. The excess water then removed from heating and convert gel into fine powder.

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Chapter 12, Problem 12.129SP

Interpretation Introduction

Interpretation:

The balanced equation for preparation of GeS2 from tetraethoxygermane and H2S should be determined.

Concept introduction:

The sol-gel method is a process that is used to produce metal oxide powder from metal alkoxide. Alkoxide is alkyl derivative molecule of alcohol. In the sol-gel method, metal alkoxide dissolves in suitable organic solvent and then reacts with water to introduce hydrolysis reaction. In hydrolysis reaction, the metal-alkoxide bonds (M−OR) breaks and metal-hydroxide (M−OH) will form. This new product is known as sol.

After formation of sol, the water molecules from sol molecule get eliminated to form bridge bonding and form a gel-like material. The excess water then removed from heating and convert gel into fine powder.

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