Grav3 Upload Ass 3 Theory Gravimetric Estimation of Bariumm

Grav3 Upload Ass 3 Theory Gravimetric Estimation of Bariumm Theory ProcedureSelf Evaluation Animation Assignment Reference Feedback TheoryProcedure Procedure: ·The given batum, chioride solder, is made up to 100ml n a standard nask 20mL of solution is plpetted into a 250 mL beaker .About SmL 2N HC) is added and diluted to 1s0mL with distilled water The solution is heated to boiling and a hot solution of 4N H,So. (10 -1SmL) is added drop by drop with constant stirring, till the precipitation is complete. The solution containing the precipitate is heated in a water bath for 5 minutes ·The precipitate is allowed to stand for an hour The clear solution is decanted through an ashless filter paper (whatman No. 40). The precipitate is washed with hot distilled water to free sulphate ions. The particles adhering to the sides of the beaker and glass rod are removed by a policeman Finally the precipitate is washed once again The dried filter paper is folded and placed in a crucible which has been previously weighed . The fiter paper with the precipitate is first incinerated on·Bunsen burner by a low anne and then transferred to an electric burner. . The crucible is transferred to desiccator and cooled When cold, the crucible is weighed. Heating, cooling and weighing are repeated till concordant values are obtained. Calculation: Hass of crucible +lid ag Mass of crucible + lid + Ban Type here to search

Solution

As per the given information .the whole of the barium sulfate in the solution was precipitated as barium sulfate and mass of barium sulfate precpitate determined gravimetrically.

Determination of mass of barium in the solution=mass of barium in the precipitate.

mass of barium sulfate=(b-a) g

233.36g (1mol ) of barium sulfate(BaSO4 ) contain 137.36g(=1 mol) of barium

so, mass of barium in (b-a )g=(137.36g/233.36g )*(b-a) g

mass of barium in the whole solution=(137.36g/233.36g )*(b-a) g