Does the composition given for the Mississippi River violate the

assumption of electroneutrality? In other words, are there errors in

the data or important ions that are not considered in your ionic

strength estimate? Justify your conclusion.

e$.$ A typical value for the concentration of inorganic N$(-$III$)$ in municipal

wastewater effluent is $25$ mg N$/$L$.$ How much would the effluent need

to be diluted $($e$.$g$.,$ the toxicity threshold will be exceeded if the

effluent$-$receiving water contains more than $\_\_\%$ effluent$)$ to protect