S.I.F. Study is fun

Our Objective Our objective is to determine the melting point of an organic compound. The Theory What is the importance of knowing the melting point of organic compounds? The melting point is an important physical property of a compound. The melting point can be used to identify a substance and as an indication of its purity. The melting point of solid is defined as the temperature at which the solid exists in equilibrium with its liquid under an external pressure of one atmosphere. A pure crystalline compound usually possesses a sharp melting point and it melts completely over a narrow range of temperature of not more that 0.5-1 o C. The presence of even small amount of impurities usually produces a depression in the freezing points and shows a marked increase in the width of the melting point range. The melting point range of > 5 o C indicates that the substance is impure. For a material whose identity is known, an estimate of degree of purity can be made by comparing

Our Objective Our Objective is to prepare the crystals of the following substances form their impure samples through crystallisation; Copper sulphate Potash alum Benzoic acid  The Theory What happens during crystallisation? The chemicals used for various purposes should be pure, completely free from any type of impurities. Method of purification of a substance depends upon the nature of impurities present in it. There are various methods for the purification of substances, e.g., filtration, evaporation, decantation, distillation, and crystallization. Crystallisation is one of the very important purification techniques, purifying substances by removing unwanted by-products. Crystalline compounds are generally purified via this crystallisation process. The principle behind the crystallisation is that the amount of solute that can be dissolved by a solvent increases with temperature. In crystallisation, the impure substance is dissolved in a suitable solvent to reach it

Our Objective Our objective is to study the shift of equilibrium between ferric ions and thiocyanate ions by increasing the concentration of either of them.  Theory Let's see how chemical equilibria behave when concentration changes. Many chemical reactions involve a state of equilibrium. Equilibrium is said to be dynamic when the rate of forward reaction become equal to that of the backward reaction. Consider a general reversible reaction;   With the passage of time, there is a depletion of the reactants A and B and an accumulation of the products C and D. As a result, the rate of forward reaction decreases and that of backward reaction increases. Eventually, the two reactions occur at the same rate and the system reaches a state of equilibrium.  Let us explain the 'Law of Chemical Equilibrium'   Norwegian chemists Cato Maxmillian Guldberg and Peter Waage proposed that for a chemical reaction;  The rate of reaction in either direction is proport