Calculate specific surface area (m2/g) of a colloid, which is made of 29 nm diameter spherical particles. The density of the particle material is 2.6 g/cm3. (b) Calculate how many moles of Ca2+ ions can be removed through surface adsorption by 45 mg this colloid, assuming full surface coverage of colloidal particles by calcium ions. The ionic radius of calcium is 0.114 nm. Be sure to make a drawing to conceptualize this problem before attempting to solve it. Take a bunch of identical coins (calcium) and lay them down on rectangular piece of cardboard (total colloid surface) and then try relating what you see with the problem.
Answer:
Specific area(m2g) = ? Amount of Ca2+ (umol) = ?