You are tasked to use a strong-acid polystyrene cross-linked with pure divinyl benzene ion-exchanger resin operated with a sulfonated sodium to remove aluminum from a wastewaterstream.
the influent water has only two cations with 5 meq/l of aluminum and 2.5 meq/l of sodium.
the exchanger has a capacity of 2 eq/l with an operating equilibrium constant of 3 foraluminum.
a) derive the relationship between the concentration of aluminum in solution and resin thatgoverns this exchange. also, generalize the equation for an ion of valency ânâ.

b) write down the chemical reaction that is expected to take place between the resin andaluminum in wastewater. estimate how much of wastewater can be treated per ft3 of resinbefore it has to be regenerated.

Nanotechnology, the field of trying to build ultrasmall structures one atom at a time, has progressed in recent years. one potential application of nanotechnology is the construction of artificial cells. the simplest cells would probably mimic red blood cells, the body's oxygen transporters. for example, nanocontainers, perhaps constructed of carbon, could be pumped full of oxygen and injected into a person's bloodstream. if the person needed additional oxygen-due to a heart attack perhaps, or for the purpose of space travel-these containers could slowly release oxygen into the blood, allowing tissues that would otherwise die to remain alive. suppose that the nanocontainers were cubic and had an edge length of 24 nanometers. part a part complete what is the volume of one nanocontainer? (ignore the thickness of the nanocontainer's wall.) express your answer using two significant figures. v v = 1.4ă—10â’20 l previous answers correct significant figures feedback: your answer 1.3824â‹…10â’20 = 1.382ă—10â’20 l was either rounded differently or used a different number of significant figures than required for this part. if you need this result for any later calculation in this item, keep all the digits and round as the final step before submitting your answer. part b suppose that each nanocontainer could contain pure oxygen pressurized to a density of 81 g/l . how many grams of oxygen could be contained by each nanocontainer?

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml

Afusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element is a) lighter than helium.b)heavier than helium.c)the same weight as helium.d)dependent on the element that reacted with carbon.