Wastewater having 22 mg/l dissolved phosphorous (po43−) is treated chemicaly with ferric sulfate ((fe2(so4)3) (concentrated solution of 165 gr/l as fe). how much stock solution (volume in ml) of ferric sulfate is needed per a liter of water treated to achieve 100% po43− removal? how much solids (on a dry basis) are generated in the process per a million gallons of water treated? (show your calculations and provide answers in ml (for volume) and kg (for solids))

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

In water, a strong acid will break down into its component parts. a. completely b. partly c. never in water, a weak base will break down into its component parts. a. completely b. partly c. never

Consider the story you just read. all but one of the choices below indicate that something is living.