lab report

Topics: Water, Oxygen, Carbon dioxide Pages: 3 (634 words) Published: February 20, 2014
Experiment 1 Separation of Mixtures
Summary of Principles:
Most of the materials we encounter in everyday life are not pure substances. Many materials such as sand are formed from physical combination of various substances, and are called mixtures. Mixtures can be classified into homogeneous and heterogeneous. The purpose of this lab is to learn how to separate individual components from a mixture through decantation, filtration, distillation, and crystallization. Pre-Lab Questions:

Apparatus and Supplies:
Electronic balance
50 mL beaker
100 mL beaker
10x75 mm test tubes
Hot plate
Glass rod
Filter paper
Ring stand
Ring support
Watch glass
Chemicals and their properties:

ChemicalPhysical PropertiesChemical Properties
Silicon dioxideWhite, crystalline solid, MP: 1710°C, BP: 2590°C,Density: 2533 kg m-3Irritant, reacts with water to form silicon hydroxide Copper (II) sulfateBlue, crystalline granules or powder, odorless, white when dehydrated, solubility in water: 316 g/L, density: 2.284 g/cm3, MP: 30°C and 110°CReacts with most metals to make copper and a metal sulfate, reacts with iron to make copper and iron (II) sulfate Calcium carbonateWhite, odorless, tasteless powder, MP: 825° C, BP: 899° CReaction enthalpy 178 kJ / mole, react with water that is saturated with carbon dioxide to form the soluble calcium bicarbonate Hydrochloric acidColorless gas, pungent odor, MP: -114.9 °C, BP: -85.06 °C, density: 1.18 g/cm3, heat of vaporization: 15.1 kJ/mol, VP: -115.5 CMonoprotic, Ka, consists of the non-reactive and non-toxic chloride ion Iron filingsGray, lustrous powder, insoluble, MP: 1535, BP: 3000, density: 7.86 g/cm3It has to be absorbed in another form such as a ferric salt.

Separation of a Mixture of Sand and Iron
Place the bar magnet inside a sandwich bag, while holding one end of the magnet, move the other end through the mixture. Once the iron filings stick to...
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