The reactions that occur in conversion of Y ( OH ) 3 sol into gel should be explained. Also, the chemical formula of ceramic that from after gel is dried and sintered 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 12.127SP

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Interpretation:

The reactions that occur in conversion of Y(OH)3 sol into gel should be explained. Also, the chemical formula of ceramic that from after gel is dried and sintered 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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