Determination of the concentration of sulphuric acid by titration

Determination of the concentration of sulfuric tart by titration baffle To determine the concentration of a solution of sulphuric sour by titration with sodium hydroxide Apparatus 250mL E-flask, stirrer with magnet, buret +0.1 ml, 10.0ml pipette Chemical H2SO4(aq), 0.100M NaOH(aq), BTB (pH-indicator) Experimental The burette is rinsed by and modify up by NaOH-solution. It is required that no transfer bubbles manifest in the burette. 10.0ml of the H2SO4 is filled into the E-flask and diluted by distilled water proviso to about 100 cm3. wherefore 10 sinks of BTB and a magnetised stirring bar are added to it. After dropping 5 drops of BTB, the H2SO4 starts to change warp to pale yellow. Furthur dropping 5 more than 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 score a drop of ghastly colour liquid when adding a drop of NaOH. However, it gr adually disappear. The titration is considered to be end until the colour turns to green. thence 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 + Na2SO4 Aver age of volume of NaOH used for titration: (2! 0.0+19.3+19.4)/3=19.57ml  come up of NaOH = tightness of NaOH Volume of NaOH fare of NaOH =0.1 0.1957 kernel 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

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