Determination of the concentration of sulphuric acid by titration

Determination of the concentration of sulfuric tart by titration take down To determine the concentration of a solution of sulphuric sulfurous by titration with sodium hydroxide Apparatus 250mL E-flask, stirrer with magnet, burette +0.1 ml, 10.0ml pipette Chemical H2SO4(aq), 0.100M NaOH(aq), BTB (pH-indicator) Experimental The burette is rinsed by and change up by NaOH-solution. It is required that no transfer bubbles turn in in the burette. 10.0ml of the H2SO4 is filled into the E-flask and diluted by distilled water tot to about 100 cm3. wherefore 10 capitulations of BTB and a magnetise stirring bar are added to it. After dropping 5 drops of BTB, the H2SO4 starts to change glossary to pale yellow. Furthur dropping 5 to a greater extent than drops, it becomes yellow. The E-flask is placed on the magnetic stirrer. The liquid is stirred. H2SO4 is titrated with NaOH. The H2SO4 is observed to give rise a drop of ghastly colour liquid when adding a drop of NaOH. However, it gradually disappear. The titration is considered to be end until the colour turns to green. and so the above procedure is repeated twice. The collected data is shown in table 1 Table 1. Raw data from titration of sulphuric acid with sodium hydroxide to determine the concentration of sulphuric acid mental testing1 st (+0.1ml)2nd (+0.1ml)3rd (+0.1ml) Vol. Of NaOH used when a blue drop starts to appear but gradually disappear12.2 ml11.7 ml12 ml Vol.

Of NaOH used when the colour is green20.0ml19.3 ml19.4 ml Calculations The equation of titration: 2NaOH + H2SO4  2H2O + N a2SO4 Average of volume of NaOH use! d for titration: (20.0+19.3+19.4)/3=19.57ml  come up of NaOH = niggardness of NaOH Volume of NaOH fare of NaOH =0.1 0.1957 substance of NaOH =1.957 x 10-3 mol  mill ratio of NaOH and Na2SO4 : 2:1 NaOH =0.5 Na2SO4 Amount of Na2SO4: 1.957 x 10-3 /2 =9.785x 10-4 mol Amount of Na2SO4 = Concentration of Na2SO4 Volume of Na2SO4 9.785x 10-4 =...If you want to get a broad(a) essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper