Posted: September 13th, 2017

ULTRAVIOLET/VISIBLE (UV/VIS) SPECTROSCOPY

Paper, Order, or Assignment Requirements

Given that the standard phosphate solution has a POB4PB3-P concentration of 200 µg ml-1, calculate the concentration of phosphate in flask H to K. Plot a graph of absorbance (A) versus concentration and use this graph to determine the phosphate concentration of river water.

Please draw all graphs on graph paper or use a computer program such as Excel or OfficeHD both result tables.

answer these questions :

QUESTIONS

1. How do you determine the wavelength at which to set the spectrophotometer?

2. What should you do if your unknown solution shows an absorbance reading of 2.3?