EUDIOMETRY QUESTIONS PDF

The reactant with the least number of equivalents is the limiting reactant. DearPreparing for entrance exams? Leave a Reply Cancel reply You must be logged in to post a comment. Also browse for more study materials on Chemistry here. Gas Eudiometry What is its formula? Next a known excess of oxygen is introduced and the electric spark is passed, whereby the combustible material gets oxidised.

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Bear a simple ratio. Gaseous reactions for investigation purposes are studied in a closed graduated tube open at one end and the other closed end of which is provided with platinum terminals for the passage of electricity through the mixture of gases, Such a tube is known as Eudiometer tube and hence the name Eudiometry also used for Gas analysis. During Gas analysis, the Eudiometer tube filled with mercury is inverted over a trough containing mercury. A known volume of the gas or gaseous mixture to be studied is next introduced, which displaces an equivalent amount of mercury.

Next, a known excess of oxygen is introduced and the electric spark is passed, whereby the combustible material gets oxidised. The volumes of carbon dioxide, water vapour or other gaseous products of combustion are next determined by absorbing them in suitable reagents. For example, the volume of CO2 is determined by absorption in KOH solution and that of an excess of oxygen in an alkaline solution of pyrogallol. Water vapour produced during the reaction can be determined by noting contraction in volume caused due to cooling, as by cooling the steam formed during combustion forms liquid water which occupies a negligible volume as compared to the volumes of the gases considered.

The excess of oxygen left after the combustion is also determined by difference if other gases formed during combustion have already been determined. From the data thus collected a number of useful conclusions regarding reactions amongst gases can be drawn. The various reagents used for absorbing different gases are O3turpentine oil.

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EUDIOMETRY QUESTIONS PDF

Nataxe Register for our mailing list. Advantages of Mole Method over other Methods: All calculations are to be carried out with the amount of the limiting reactant only. Questikns gaseous hydrocarbon requires 6 times its own volume of O 2 for complete oxidation and produces 4 times its volume of CO 2. The balanced equation for combustion. Water vapour produced during the reaction can be determined by noting contraction in volume caused due to cooling, as by cooling the steam formed during combustion forms liquid water which occupies a negligible volume as compared to the volumes of the gases considered. A known volume of the gas or gaseous mixture to be studied is next introduced, which displaces an equivalent amount of mercury.

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Balkree Get Free Sample Now. Phenolphthalein shows colour questjons after the first step and Methyl st1: Will the same be true if any hydrocarbon is completely combusted? Can you find any combustion processes using other compounds for which the total volume of gas is unchanged by the reaction? A known volume of the gas or gaseous mixture to be studied is next introduced, which displaces an equivalent amount of mercury. DearPreparing for entrance exams? The points P, Q and R are the centres of the three triangles.

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All calculations quetions to be carried out with the amount of the limiting reactant only. In the reactions where more than on reactant is involved, one has to first identify the limiting reactant, i. Concept of Limiting Reagent: From the data thus collected a number of useful conclusions regarding reactions amongst gases can be drawn. Oxidation number of s-block do not change. Water vapour produced during the reaction can be determined by noting contraction in volume caused due to cooling, as by cooling the steam formed during combustion forms liquid water which occupies a negligible volume as compared to the volumes of the gases considered.

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