You are running an $$adsorption isotherm$$ experiment where you want to measure the removal

of a contaminant, triclosan, onto a sorbent, activated carbon.

$($a$)$ For the stock preparation, you have pure triclosan powder and pure activated carbon

powder. You want to prepare a $500$ mg$/$L triclosan stock, and a separate $1$ g$/$L activated

carbon stock. The minimum mass of each powder that you can reliably weigh on the

balance is $10$ mg$.$ Compute the volume $($mL$)$ of triclosan stock and the volume $($mL$)$ of

activated carbon stock that you would need to prepare to achieve the desired stock

concentrations using the minimum measurable mass.

$($b$)$ Using the stocks, you need to prepare $5$ samples that contain mixtures of activated carbon

and triclosan at the following concentration levels listed in Table $2$: