posted by Alex .
What mass of NaOH is required to precipitate all the Fe2+ ions from 52.0 mL of 0.200 M Fe(NO3)2 solution?
Write the equation.
Fe^+2 + 2OH^- ==> Fe(OH)2
moles Fe^+2 = M x L
moles NaOH must be 2 x moles Fe^+2.
moles OH is same as moles NaOH.
g NaOH = moles NaOH x molar mass NaOH.