Gravimetric Determination of Sulfate

Gravimetric Determination of Sulfate Purpose The purpose of this science laboratory is to determine the parcel of convert in the hydrate by precipitating the sulfate as barium sulfate. Materials Filler makeup atomic number 11 sulfate Graduated cylinder etna burner Watch glass Beakers (250 mL, 400 mL) Rubber medulla oblongata Graduated pipette Beaker tongs Funnel Filter root word Sodium Sulfate Drying oven Wash bottle Stirring perch Silver nitrate Hydrochloric acid Distilled water supply minuscule test tube Procedures First, .4861 grams of sodium sulfate was fixed into a clean 400mL beaker. Exactly 200mL of water and 1mL of HCl was added to the same beaker. A retard glass was placed on the beaker and the firmness was heated exploitation the Bunsen burner to a light boil. The watch glass was stop with the beaker tongs. Using a safety bulb and a inhalation rod to stir the base continuously, 15.00mL of .25M BaCl2 so lution was added to the solution in the beaker. The watch glass is replaced and the solution is keep hot scarce not boiling for 15 minutes. The precipitate was allowed to settle. When the liquid above the precipitate was clear, the solution was tried and true for completeness of precipitation when a some drops of BaCl2 solution were added from a pipette.

Next, gain vigor piece was place into the funnel and streamed with distilled water. A clean 400mL beaker is placed low the funnel and the precipitate was filtered through. When all the precipitate was filtered and removed from the beaker the remnant is washed with distilled water. Ab give away 3mL of t! he wash water is salt forward in a small test tube. A a few(prenominal) drops of 0.1M silver nitrate solution is added to the water to test for the presences of Cl- ions. at long last the filter paper was placed in the dry out oven to dry completely and then weighted. Calculations and observations were made and recorded. Observations The precipitate produced from the salmagundi of solutions was small-grained white and made the water cloudy. When the...If you want to germinate a full essay, order it on our website: BestEssayCheap.com

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