frasch process problems

The metal to be refined is placed over the sloping hearth of a furnace The temperature of the furnace is maintained slightly above the melting point of the metal Pure metal melt and flow down Impurities, having higher melting point, are left behin..

A block of impure metal is made the anode of an electrolytic cell containing an aqueous solution of the metal salt A thin sheet of pure metal is made the cathode of the electrolytic cell When electric current of a suitable voltage is passed, metal ions from the electrolyte get deposited on ..

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Riverbed sand containing fine particles of gold is repeatedly washed in a pan with flowing water. Gold particles settle to the bottom of the pan because of higher density while lighter sand particles are washed over the edge of the pa..

A known mass (0.2 - 0.3 g) of the organic substance is heated with fuming nitric acid in a Carius tube for about 2 hours. The phosphorus of the organic compound gets converted into phosphoric acid. The total phosphate content of the solution is reacted with magnesia mixture (mixture of a solution ..

The impure liquid or a mixture of two liquids is taken in a distillation flask fitted with a thermometer and a condenser. The flask is heated on a sand bath, on a wire gauze or in a water bath. The more volatile liquid, i.e. the one having a lower boiling point, boils first and the vapors distill ..

Distillation under reduced pressure or vacuum is carried out in a specially designed glass apparatus. A two necked 'Claisen's flask' is used, the main neck of which is fitted with a long capillary tube and the side neck being fitted with a thermometer. The side tube is connected to a condenser car..

A liquid (water), having boiling point about 20 to 30C higher than that of the given liquid (whose molecular mass is to be determined) is poured into the outer jacket so as to fill its bulb up to one-third its capacity. Cleaned and dried Victor Meyer's tube is suspended into the outer copper jacke..

Crude petroleum is pumped into the furnace where it is heated to a temperature of about 400 o C. Petroleum is converted to vapors in the furnace. The vapors of petroleum are fed into the fractionating column from the bottom. As the vapors enter the column, they rise up and gradually get c..

The term spontaneity means the feasibility of a process. A process which can take place by itself under the given set of conditions once it has been initiated if necessary, is said to be a spontaneous process. The spontaneous processes are called feasible or..