Gravimetric determination of water in hydrated magnesium chloride

Aim: To calculate the value of n in MgCl2.n urine Theory: Gravimetric stocky is where the amount of a special(prenominal) chemical in a material is determined by converting it to a product which impersonate up be set-apart completely and weighed. This is relevant to this look into as the amount of pissing is an unknown value which is to be name by carrying surface the analysis. Heating to constant chew is when repeat estrus, chilling soce weighing is carried break through until the plentifulness of the substance is constant. The military issue of moles of water in a substance can be found by amount the deprivation in chain reactor on modify. MgCl2.nH2O MgCl2.nH2O n can be calculated by news report the mass of hydrated third estate salt with the mass of anhydrous salt by heating to constant mass. Apparatus: The equipment required is: a porcelain liquescent pot and lid tripod pipe-clay triangle bunsen burner and heating mat desiccator tongs a balance hydrated barium chloride. Method: To get rid of any(prenominal) water the melting pot was heated, accordingly allowed to nerveless in a desiccator and its mass was renowned (M1). 2-3g of atomic number 12 chloride was then added and the crucible reweighed (M2). The crucible and its contents were then reheated for 15 minutes, allowed to cool and again weighed (M3).

The crucible and its contents were then heated, allowed to cool and weighed again, (M4), to make sure the loss in mass was complete. This ill-use was repeated until M4 and M5 were constant. Results: M1 = 39.59g M2 = 41.62g M3 = 40.64g M4 = 40.63g Average mass of crucible and anhydrous MgCl2 = 40.635 Mass of anhydrous MgCl2 (M4 - M1) = 1.045g Number of moles of MgCl2 (GFM = 95.3g) = 1.045/95.3 = 0.012moles Mass of H2O removed M2 - M4 = 0.985g Number of moles of H2O (GFM... If you fatality to get a honorable essay, order it on our website: Ordercustompaper.com

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