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.

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet