Essays on Melting Point

Melting point temperature is a physical belongings of pure substances. It is an intensive belongings. which means the sum of stuff tested is irrelevant. This lab will find the thaw point temperatures of two known pure substances. naphthalene and p-dichlorobenzene. utilizing micro-sized measures and a capillary thaw tubing setup. The per centum mistake will so…

Abstract The various methods available to synthesize aspirin lead to the need to examine and evaluate production efficiency and purity. The purpose of our experiment was to synthesize acetyl salicylic acid (aspirin) and then determine the relative purity of the synthesized sample by observing the melting point temperature range. The procedure performed in our experiment…

The aims of this lab are. as follows ; to understand what occurs at the molecular degree when a substance thaw ; to understand the primary intent of runing point informations ; to show the technique for obtaining the runing point of an organic substance ; and to explicate the consequence of drosss on the…

Abstract A common road salt, magnesium chloride, was analyzed in the lab to test its effectiveness as a road salt. The Van’t Hoff factor of the salt and the enthalpy of dissolution when dissolved in pure water were experimentally tested to evaluate its many characteristics as a deicer. To determine the Van’t Hoff factor, the…

Introduction Paracetamol is a medication used to relieve fever, its chemical name is acetaminophen. Its molecular formula is CH3CONHC6H4OH and its molecular weight is 151. 2 g/mol. The melting point of pure compound is in the range of 169-172 ?. During lab Paracetamol medication was dissolved in water, purified and recrystallized again. The purpose of…

Report- Identification of Substances by Physical Properties The purpose of this lab was to see how certain substances; Naphthalene, Toulene, and and 2 unknowns (one liquid, one solid) react with 3 different solvents. To identify the two unknowns, testing needs to be done to find the density of both the liquid and the solid, determine…

Abstract Thermal analysis of a solid-liquid phase using cooling curves at various compositions is a method used to obtain the eutectic composition and temperature of naphthalene-biphenyl. The XE was 0. 45 and the TE was 310. 3K these are slightly different from the theoretical values which are 0. 44 and 312K respectively. Results The cooling…

Experiment 2Date: 24 January 2006 Title:Crystallization of a Crude Sample Objective:Preparation of pure diphenyl via crystallization of crude diphenyl dissolved in ethanol. Structural Formula of Organic Substances Involved: DiphenylEthanol Apparatus:Round-bottom flask (100 mL), measuring cylinder (50 mL), conical flask (50 mL), filter flask, beaker (100 mL), stemless glass funnel, Hirsch funnel, capillary tube, long glass…