Saccharin (C7H5NO3S) is sometimes dispensed in tablet form. Ten tablets with total mass of 0.5860 g were dissolved in water. They were oxidized to convert all the sulfur to sulfate ion, which was precipitated by adding an excess of barium chloride solution. The mass of BaSO4 obtained was 0.5282 g. What is the average mass of saccharin per tablet? What is the average mass pecent of saccharin in the tablets?
mass BaSO4 = 0.5282
mols BaSO4 = grams/molar mass = estimated 0.00226 but you need to do it more accurately. The other number below are estimates also.
mols BaSO4 = mols saccharin
g saccharin = mols x molar mass = about 0.42g.
That's for 10 tablets so make that about 0.042 g/tablet.
%saccharin = (total mass sacc/total mass sample)*100 = ?
To find the average mass of saccharin per tablet, you need to determine the mass of saccharin in the 10 tablets and then divide it by the number of tablets.
First, let's find the mass of saccharin in the 10 tablets. We know the total mass of the tablets (0.5860 g) and the mass of BaSO4 obtained (0.5282 g).
The difference in mass between the total mass of the tablets and the mass of BaSO4 obtained represents the mass of saccharin:
Mass of saccharin = Total mass of tablets - Mass of BaSO4
Mass of saccharin = 0.5860 g - 0.5282 g
Mass of saccharin = 0.0578 g
Now we can calculate the average mass of saccharin per tablet:
Average mass of saccharin per tablet = Mass of saccharin / Number of tablets
Average mass of saccharin per tablet = 0.0578 g / 10
Average mass of saccharin per tablet = 0.00578 g/tablet
To find the average mass percent of saccharin in the tablets, we need to calculate the mass percent of saccharin and then average them.
Mass percent of saccharin = (Mass of saccharin / Total mass of tablets) x 100
Mass percent of saccharin = (0.0578 g / 0.5860 g) x 100
Mass percent of saccharin = 9.87%
Therefore, the average mass of saccharin per tablet is 0.00578 g/tablet and the average mass percent of saccharin in the tablets is 9.87%.