The precipitative gravimetric analysis finds applications in environmental chemistry for precipitation of sulfates from wastewater. There are different steps and conditions required in such a real-life situation unlike the lab experiment dealing with only chlorides. Required:
Perform a literature search and discuss the measures (for example-temperature, pH changes, chemical reactions) taken during wastewater treatment for recovering sulfates and other contaminants.

Barium precipitation : in this method we will add Barium chloride to the wastewater to precipitate Barium sulphate  precipitate from the waste water

Explanation:

The measures that can be taken for the recovery of sulfates and other contaminants from wastewater includes : ion exchange, precipitation and Reverse osmosis. of all these measures i will discuss precipitation

Precipitation measures can be performed using different methodologies the methodology that i will discuss is :

Barium precipitation : in this method we will add Barium chloride to the wastewater to precipitate Barium sulphate  precipitate from the waste water

The sulphate contained in the wastewater can be reduced to as low as 200 mg/l using this method

Temperature : the increase in temperature of the waste water will cause the reduction in formation of sulphate in the waste water

PH changes : for the precipitation of sulphate to be effective the required PH level  is 4.5

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

the answer is option a.