Chem Lab 2

Topics: Chemical substance, Mixture, Chemistry Pages: 4 (996 words) Published: August 4, 2013
Experiment no. 2
Classification of Matter
Morillo, Mary Jane J.
Nidua, Maria Angelene
Group no. 2/Chemistry Lab./Engr. Ma. Jeanette U. Obias

Abstract

The classification of matter was demonstrated through simple activities of mixture, heating and magnetic attraction describing its physical state , its chemical reactions and its separation to other substances. Simple reagents such as Iron filings and Sulfur powder in our experiment were considered as elements, while solid mixtures such as Fe filings and S powder were classified as heterogenous because after combining it their properties were still distinguishable from each other but when heated it is already considered as a solution. Water and Sodium Chloride were compounds given they are two or more elements, while mixing them we were able to create a solution. The Nacl that dissolves into H20 are techinically dissociated into ions but after heating it the table salt comes back without H20.

Introduction
Matter is anything that occupies space and has a mass. It can be classified into elements, compounds and mixtures. Pure substances are divided into categories as elements and compounds. Elements cannot be divided into simpler substances. Compounds are substances composed of two or more elements. Mixtures are combinations of two or more substances in which each substance retains its own chemical identity. Mixtures can be described through homogenous mixture and heterogenous mixture.Homogenous mixtures has components that are indistingushable with each other e.g. (colloids) while Heterogenous mixtues' components can be distinguished from each other e.g. (suspensions). Mixtures can be separated by physical changes through distillation, decantation, evaporation,and the use of magnet.

Materials and Methods
The reagents that we used are the following: Iron fillings, Distilled Water, Sodium Chloride (NaCl), Sulfur. The equipments:100ml Beaker, Bunsen Burner, watch Glass, Stirring rod, Magnet, Mortar...

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