A modified dextran will adsorb up to a maximum of &x $10^-8$ mol of IgG per cm$3$ of dextran. The adsorption follows a Langmuir adsorption isotherm with a constant $=5*10^-7$ Iiter$/$mol$.$ a$)$What is the value of qi in the linear part of the adsorption$$isotherm$?$ b$)$ Assuming a linear adsorption isotherm, how much dextran do you need to adsorb $90\%$ of the protein in $2$ liters of solution initially containing$4*10^-6$ mol$/$liter$?$