Iron(III) sulfate is used as a coagulant for industrial waste. Write dissociation equation and calculate the concentration of the solute needed to produce a Fe2 SO4 solution with 0.600 mol/L iron(III) ions. 

Due to its highly conductive nature, potassium hydroxide often is used as the electrolyte in alkaline batteries. Determine the concentration of the KOH solution when 35.0 mL of 6.00 mol/L KOH is diluted to 125 mL.