The Determination of Unknown Solid Organic Compound by Qualitative Analysis

THE DETERMINATION OF UNKNOWN SOLID ORGANIC COMPOUND BY QUALITATIVE ANALYSIS

By

Ni Luh Gede Enik Karnila Yanti

Chemistry Education Department, Faculty of Mathematics and Natural Sciences, Ganesha University of Education

email: enikkarnilayanti@yahoo.co.id

Abstract

The aim of the experiment was to determine (1) physical properties of unknown solid organic compound, (2) the elements contained in the unknown solid organic compound, (3) the functional groups contained in the unknown solid organic compound, and (4) derivation compound of the unknown solid organic compound. Laboratory assistant prepared the unknown solid organic compound as subjects of the experiment. The object was the structure of the unknown solid organic compound. It was obtained through qualitative analysis are the physical and chemical properties of the unknown solid organic compound. The physical properties of the unknown solid organic compound has melting point of 120⁰C-120.5⁰C. The element analysis of unknown solid organic compound results carbon, hydrogen and oxygen. The functional group and derivative analysis it has unsaturated bond, aromatic structure, positive of phenol group and phenol derivative. The physical and chemical properties of the unknown organic compound were similar to the physical and chemical properties of 2-Naphthol, that means that the unknown sample is definitely 2–naphthol.

Key word: organic compound, qualitative analysis, 2-Naphthol

Chemistry of Noble Gas

CHEMISTRY OF NOBLE GAS

Noble gases are a special group because it is the most stable group in the periodic table. Noble gases have electron valence configuration s²p⁶, except helium with electron valence configuration s². This structure cause noble gases are unreactive. Although noble gases are stable and unreactive but, it could form compounds with some mechanisms. Beside that, noble gases are useful in human life. In this essay will explain briefly the properties of noble gases, their uses, as well as some compound of noble gases and their ways of preparation.