The poh of a solution is 6.0. which statement is correct? use mc030-1.jpg and mc030-2.jpg. the ph of the solution is 20.0. the concentration of oh– ions is mc030-3.jpg. the concentration of oh– ions is mc030-4.jpg. the ph of the solution is 8.0.

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.